Synchronization errors when writing to oc_file_locks DB table after upgrade from 15 to 16

Nextcloud version (eg, 12.0.2): 16.0.4
Operating system and version (eg, Ubuntu 17.04): docker image
Apache or nginx version (eg, Apache 2.4.25): nextcloud-16-apache
PHP version (eg, 7.1):
Database: postgresql

The issue you are facing:

I recently did an upgrade from 15 to 16. 15 worked fine.
Now, when I try to synchronize files, I get a log entry like below. I have no idea where to poke in, can anyone help?

The output of your Nextcloud log in data/nextcloud.log

{"reqId":"9cg62p4nT8JWGvHnGdDq","level":4,"time":"2019-08-20T09:40:02+00:00","remoteAddr":"172.17.0.1","user":"elehmann","app":"webdav","method":"PUT","url":"\/\/remote.php\/webdav\/jxplorercsvconfig.txt","message":{"Exception":"Doctrine\\DBAL\\Exception\\SyntaxErrorException","Message":"An exception occurred while executing 'INSERT INTO \"oc_file_locks\" (\"key\", \"lock\", \"ttl\") VALUES(?, ?, ?) ON CONFLICT DO NOTHING' with params [\"files\\\/1a4f0fe49322fb91504c492c49c70143\", 1, 1566297602]:\n\nSQLSTATE[42601]: Syntax error: 7 ERROR:  syntax error at or near \"ON\"\nLINE 1: ..._locks\" (\"key\", \"lock\", \"ttl\") VALUES($1, $2, $3) ON CONFLIC...\n                                                             ^","Code":0,"Trace":[{"file":"\/var\/www\/html\/3rdparty\/doctrine\/dbal\/lib\/Doctrine\/DBAL\/DBALException.php","line":184,"function":"convertException","class":"Doctrine\\DBAL\\Driver\\AbstractPostgreSQLDriver","type":"->","args":["An exception occurred while executing 'INSERT INTO \"oc_file_locks\" (\"key\", \"lock\", \"ttl\") VALUES(?, ?, ?) ON CONFLICT DO NOTHING' with params [\"files\\\/1a4f0fe49322fb91504c492c49c70143\", 1, 1566297602]:\n\nSQLSTATE[42601]: Syntax error: 7 ERROR:  syntax error at or near \"ON\"\nLINE 1: ..._locks\" (\"key\", \"lock\", \"ttl\") VALUES($1, $2, $3) ON CONFLIC...\n                                                             ^",{"errorInfo":["42601",7,"ERROR:  syntax error at or near \"ON\"\nLINE 1: ..._locks\" (\"key\", \"lock\", \"ttl\") VALUES($1, $2, $3) ON CONFLIC...\n                                                             ^"],"__class__":"Doctrine\\DBAL\\Driver\\PDOException"}]},{"file":"\/var\/www\/html\/3rdparty\/doctrine\/dbal\/lib\/Doctrine\/DBAL\/DBALException.php","line":158,"function":"wrapException","class":"Doctrine\\DBAL\\DBALException","type":"::","args":[{"__class__":"Doctrine\\DBAL\\Driver\\PDOPgSql\\Driver"},{"errorInfo":["42601",7,"ERROR:  syntax error at or near \"ON\"\nLINE 1: ..._locks\" (\"key\", \"lock\", \"ttl\") VALUES($1, $2, $3) ON CONFLIC...\n                                                             ^"],"__class__":"Doctrine\\DBAL\\Driver\\PDOException"},"An exception occurred while executing 'INSERT INTO \"oc_file_locks\" (\"key\", \"lock\", \"ttl\") VALUES(?, ?, ?) ON CONFLICT DO NOTHING' with params [\"files\\\/1a4f0fe49322fb91504c492c49c70143\", 1, 1566297602]:\n\nSQLSTATE[42601]: Syntax error: 7 ERROR:  syntax error at or near \"ON\"\nLINE 1: ..._locks\" (\"key\", \"lock\", \"ttl\") VALUES($1, $2, $3) ON CONFLIC...\n                                                             ^"]},{"file":"\/var\/www\/html\/3rdparty\/doctrine\/dbal\/lib\/Doctrine\/DBAL\/Connection.php","line":1088,"function":"driverExceptionDuringQuery","class":"Doctrine\\DBAL\\DBALException","type":"::","args":[{"__class__":"Doctrine\\DBAL\\Driver\\PDOPgSql\\Driver"},{"errorInfo":["42601",7,"ERROR:  syntax error at or near \"ON\"\nLINE 1: ..._locks\" (\"key\", \"lock\", \"ttl\") VALUES($1, $2, $3) ON CONFLIC...\n                                                             ^"],"__class__":"Doctrine\\DBAL\\Driver\\PDOException"},"INSERT INTO \"oc_file_locks\" (\"key\", \"lock\", \"ttl\") VALUES(?, ?, ?) ON CONFLICT DO NOTHING",{"1":"files\/1a4f0fe49322fb91504c492c49c70143","2":1,"3":1566297602}]},{"file":"\/var\/www\/html\/lib\/private\/DB\/Connection.php","line":216,"function":"executeUpdate","class":"Doctrine\\DBAL\\Connection","type":"->","args":["INSERT INTO \"oc_file_locks\" (\"key\", \"lock\", \"ttl\") VALUES(?, ?, ?) ON CONFLICT DO NOTHING",["files\/1a4f0fe49322fb91504c492c49c70143",1,1566297602],[2,2,2]]},{"file":"\/var\/www\/html\/lib\/private\/DB\/AdapterPgSql.php","line":49,"function":"executeUpdate","class":"OC\\DB\\Connection","type":"->","args":["INSERT INTO \"oc_file_locks\" (\"key\", \"lock\", \"ttl\") VALUES(:dcValue1, :dcValue2, :dcValue3) ON CONFLICT DO NOTHING",{"dcValue1":"files\/1a4f0fe49322fb91504c492c49c70143","dcValue2":1,"dcValue3":1566297602},{"dcValue1":2,"dcValue2":2,"dcValue3":2}]},{"file":"\/var\/www\/html\/lib\/private\/DB\/Connection.php","line":261,"function":"insertIgnoreConflict","class":"OC\\DB\\AdapterPgSql","type":"->","args":["file_locks",{"key":"files\/1a4f0fe49322fb91504c492c49c70143","lock":1,"ttl":1566297602}]},{"file":"\/var\/www\/html\/lib\/private\/Lock\/DBLockingProvider.php","line":139,"function":"insertIgnoreConflict","class":"OC\\DB\\Connection","type":"->","args":["file_locks",{"key":"files\/1a4f0fe49322fb91504c492c49c70143","lock":1,"ttl":1566297602}]},{"file":"\/var\/www\/html\/lib\/private\/Lock\/DBLockingProvider.php","line":185,"function":"initLockField","class":"OC\\Lock\\DBLockingProvider","type":"->","args":["files\/1a4f0fe49322fb91504c492c49c70143",1]},{"file":"\/var\/www\/html\/lib\/private\/Files\/Storage\/Common.php","line":715,"function":"acquireLock","class":"OC\\Lock\\DBLockingProvider","type":"->","args":["files\/1a4f0fe49322fb91504c492c49c70143",1]},{"file":"\/var\/www\/html\/lib\/private\/Files\/Storage\/Wrapper\/Wrapper.php","line":593,"function":"acquireLock","class":"OC\\Files\\Storage\\Common","type":"->","args":["files\/jxplorercsvconfig.txt",1,{"__class__":"OC\\Lock\\DBLockingProvider"}]},{"file":"\/var\/www\/html\/lib\/private\/Files\/View.php","line":1940,"function":"acquireLock","class":"OC\\Files\\Storage\\Wrapper\\Wrapper","type":"->","args":["files\/jxplorercsvconfig.txt",1,{"__class__":"OC\\Lock\\DBLockingProvider"}]},{"file":"\/var\/www\/html\/lib\/private\/Files\/View.php","line":2050,"function":"lockPath","class":"OC\\Files\\View","type":"->","args":["\/\/jxplorercsvconfig.txt",1,false]},{"file":"\/var\/www\/html\/apps\/dav\/lib\/Connector\/Sabre\/Node.php","line":378,"function":"lockFile","class":"OC\\Files\\View","type":"->","args":["\/\/jxplorercsvconfig.txt",1]},{"file":"\/var\/www\/html\/apps\/dav\/lib\/Connector\/Sabre\/Directory.php","line":153,"function":"acquireLock","class":"OCA\\DAV\\Connector\\Sabre\\Node","type":"->","args":[1]},{"file":"\/var\/www\/html\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php","line":1096,"function":"createFile","class":"OCA\\DAV\\Connector\\Sabre\\Directory","type":"->","args":["jxplorercsvconfig.txt",null]},{"file":"\/var\/www\/html\/3rdparty\/sabre\/dav\/lib\/DAV\/CorePlugin.php","line":525,"function":"createFile","class":"Sabre\\DAV\\Server","type":"->","args":["jxplorercsvconfig.txt",null,null]},{"function":"httpPut","class":"Sabre\\DAV\\CorePlugin","type":"->","args":[{"absoluteUrl":"http:\/\/cloud.....de\/\/remote.php\/webdav\/jxplorercsvconfig.txt","__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"\/var\/www\/html\/3rdparty\/sabre\/event\/lib\/EventEmitterTrait.php","line":105,"function":"call_user_func_array","args":[[{"__class__":"Sabre\\DAV\\CorePlugin"},"httpPut"],[{"absoluteUrl":"http:\/\/cloud.....de\/\/remote.php\/webdav\/jxplorercsvconfig.txt","__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]]},{"file":"\/var\/www\/html\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php","line":479,"function":"emit","class":"Sabre\\Event\\EventEmitter","type":"->","args":["method:PUT",[{"absoluteUrl":"http:\/\/cloud.....de\/\/remote.php\/webdav\/jxplorercsvconfig.txt","__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]]},{"file":"\/var\/www\/html\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php","line":254,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->","args":[{"absoluteUrl":"http:\/\/cloud.....de\/\/remote.php\/webdav\/jxplorercsvconfig.txt","__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"\/var\/www\/html\/apps\/dav\/appinfo\/v1\/webdav.php","line":80,"function":"exec","class":"Sabre\\DAV\\Server","type":"->","args":[]},{"file":"\/var\/www\/html\/remote.php","line":163,"args":["\/var\/www\/html\/apps\/dav\/appinfo\/v1\/webdav.php"],"function":"require_once"}],"File":"\/var\/www\/html\/3rdparty\/doctrine\/dbal\/lib\/Doctrine\/DBAL\/Driver\/AbstractPostgreSQLDriver.php","Line":74,"Previous":{"Exception":"Doctrine\\DBAL\\Driver\\PDOException","Message":"SQLSTATE[42601]: Syntax error: 7 ERROR:  syntax error at or near \"ON\"\nLINE 1: ..._locks\" (\"key\", \"lock\", \"ttl\") VALUES($1, $2, $3) ON CONFLIC...\n                                                             ^","Code":"42601","Trace":[{"file":"\/var\/www\/html\/3rdparty\/doctrine\/dbal\/lib\/Doctrine\/DBAL\/Connection.php","line":1079,"function":"execute","class":"Doctrine\\DBAL\\Driver\\PDOStatement","type":"->","args":[]},{"file":"\/var\/www\/html\/lib\/private\/DB\/Connection.php","line":216,"function":"executeUpdate","class":"Doctrine\\DBAL\\Connection","type":"->","args":["INSERT INTO \"oc_file_locks\" (\"key\", \"lock\", \"ttl\") VALUES(?, ?, ?) ON CONFLICT DO NOTHING",["files\/1a4f0fe49322fb91504c492c49c70143",1,1566297602],[2,2,2]]},{"file":"\/var\/www\/html\/lib\/private\/DB\/AdapterPgSql.php","line":49,"function":"executeUpdate","class":"OC\\DB\\Connection","type":"->","args":["INSERT INTO \"oc_file_locks\" (\"key\", \"lock\", \"ttl\") VALUES(:dcValue1, :dcValue2, :dcValue3) ON CONFLICT DO NOTHING",{"dcValue1":"files\/1a4f0fe49322fb91504c492c49c70143","dcValue2":1,"dcValue3":1566297602},{"dcValue1":2,"dcValue2":2,"dcValue3":2}]},{"file":"\/var\/www\/html\/lib\/private\/DB\/Connection.php","line":261,"function":"insertIgnoreConflict","class":"OC\\DB\\AdapterPgSql","type":"->","args":["file_locks",{"key":"files\/1a4f0fe49322fb91504c492c49c70143","lock":1,"ttl":1566297602}]},{"file":"\/var\/www\/html\/lib\/private\/Lock\/DBLockingProvider.php","line":139,"function":"insertIgnoreConflict","class":"OC\\DB\\Connection","type":"->","args":["file_locks",{"key":"files\/1a4f0fe49322fb91504c492c49c70143","lock":1,"ttl":1566297602}]},{"file":"\/var\/www\/html\/lib\/private\/Lock\/DBLockingProvider.php","line":185,"function":"initLockField","class":"OC\\Lock\\DBLockingProvider","type":"->","args":["files\/1a4f0fe49322fb91504c492c49c70143",1]},{"file":"\/var\/www\/html\/lib\/private\/Files\/Storage\/Common.php","line":715,"function":"acquireLock","class":"OC\\Lock\\DBLockingProvider","type":"->","args":["files\/1a4f0fe49322fb91504c492c49c70143",1]},{"file":"\/var\/www\/html\/lib\/private\/Files\/Storage\/Wrapper\/Wrapper.php","line":593,"function":"acquireLock","class":"OC\\Files\\Storage\\Common","type":"->","args":["files\/jxplorercsvconfig.txt",1,{"__class__":"OC\\Lock\\DBLockingProvider"}]},{"file":"\/var\/www\/html\/lib\/private\/Files\/View.php","line":1940,"function":"acquireLock","class":"OC\\Files\\Storage\\Wrapper\\Wrapper","type":"->","args":["files\/jxplorercsvconfig.txt",1,{"__class__":"OC\\Lock\\DBLockingProvider"}]},{"file":"\/var\/www\/html\/lib\/private\/Files\/View.php","line":2050,"function":"lockPath","class":"OC\\Files\\View","type":"->","args":["\/\/jxplorercsvconfig.txt",1,false]},{"file":"\/var\/www\/html\/apps\/dav\/lib\/Connector\/Sabre\/Node.php","line":378,"function":"lockFile","class":"OC\\Files\\View","type":"->","args":["\/\/jxplorercsvconfig.txt",1]},{"file":"\/var\/www\/html\/apps\/dav\/lib\/Connector\/Sabre\/Directory.php","line":153,"function":"acquireLock","class":"OCA\\DAV\\Connector\\Sabre\\Node","type":"->","args":[1]},{"file":"\/var\/www\/html\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php","line":1096,"function":"createFile","class":"OCA\\DAV\\Connector\\Sabre\\Directory","type":"->","args":["jxplorercsvconfig.txt",null]},{"file":"\/var\/www\/html\/3rdparty\/sabre\/dav\/lib\/DAV\/CorePlugin.php","line":525,"function":"createFile","class":"Sabre\\DAV\\Server","type":"->","args":["jxplorercsvconfig.txt",null,null]},{"function":"httpPut","class":"Sabre\\DAV\\CorePlugin","type":"->","args":[{"absoluteUrl":"http:\/\/cloud.....de\/\/remote.php\/webdav\/jxplorercsvconfig.txt","__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"\/var\/www\/html\/3rdparty\/sabre\/event\/lib\/EventEmitterTrait.php","line":105,"function":"call_user_func_array","args":[[{"__class__":"Sabre\\DAV\\CorePlugin"},"httpPut"],[{"absoluteUrl":"http:\/\/cloud.....de\/\/remote.php\/webdav\/jxplorercsvconfig.txt","__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]]},{"file":"\/var\/www\/html\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php","line":479,"function":"emit","class":"Sabre\\Event\\EventEmitter","type":"->","args":["method:PUT",[{"absoluteUrl":"http:\/\/cloud.....de\/\/remote.php\/webdav\/jxplorercsvconfig.txt","__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]]},{"file":"\/var\/www\/html\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php","line":254,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->","args":[{"absoluteUrl":"http:\/\/cloud.....de\/\/remote.php\/webdav\/jxplorercsvconfig.txt","__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"\/var\/www\/html\/apps\/dav\/appinfo\/v1\/webdav.php","line":80,"function":"exec","class":"Sabre\\DAV\\Server","type":"->","args":[]},{"file":"\/var\/www\/html\/remote.php","line":163,"args":["\/var\/www\/html\/apps\/dav\/appinfo\/v1\/webdav.php"],"function":"require_once"}],"File":"\/var\/www\/html\/3rdparty\/doctrine\/dbal\/lib\/Doctrine\/DBAL\/Driver\/PDOStatement.php","Line":143,"Previous":{"Exception":"PDOException","Message":"SQLSTATE[42601]: Syntax error: 7 ERROR:  syntax error at or near \"ON\"\nLINE 1: ..._locks\" (\"key\", \"lock\", \"ttl\") VALUES($1, $2, $3) ON CONFLIC...\n                                                             ^","Code":"42601","Trace":[{"file":"\/var\/www\/html\/3rdparty\/doctrine\/dbal\/lib\/Doctrine\/DBAL\/Driver\/PDOStatement.php","line":141,"function":"execute","class":"PDOStatement","type":"->","args":[null]},{"file":"\/var\/www\/html\/3rdparty\/doctrine\/dbal\/lib\/Doctrine\/DBAL\/Connection.php","line":1079,"function":"execute","class":"Doctrine\\DBAL\\Driver\\PDOStatement","type":"->","args":[]},{"file":"\/var\/www\/html\/lib\/private\/DB\/Connection.php","line":216,"function":"executeUpdate","class":"Doctrine\\DBAL\\Connection","type":"->","args":["INSERT INTO \"oc_file_locks\" (\"key\", \"lock\", \"ttl\") VALUES(?, ?, ?) ON CONFLICT DO NOTHING",["files\/1a4f0fe49322fb91504c492c49c70143",1,1566297602],[2,2,2]]},{"file":"\/var\/www\/html\/lib\/private\/DB\/AdapterPgSql.php","line":49,"function":"executeUpdate","class":"OC\\DB\\Connection","type":"->","args":["INSERT INTO \"oc_file_locks\" (\"key\", \"lock\", \"ttl\") VALUES(:dcValue1, :dcValue2, :dcValue3) ON CONFLICT DO NOTHING",{"dcValue1":"files\/1a4f0fe49322fb91504c492c49c70143","dcValue2":1,"dcValue3":1566297602},{"dcValue1":2,"dcValue2":2,"dcValue3":2}]},{"file":"\/var\/www\/html\/lib\/private\/DB\/Connection.php","line":261,"function":"insertIgnoreConflict","class":"OC\\DB\\AdapterPgSql","type":"->","args":["file_locks",{"key":"files\/1a4f0fe49322fb91504c492c49c70143","lock":1,"ttl":1566297602}]},{"file":"\/var\/www\/html\/lib\/private\/Lock\/DBLockingProvider.php","line":139,"function":"insertIgnoreConflict","class":"OC\\DB\\Connection","type":"->","args":["file_locks",{"key":"files\/1a4f0fe49322fb91504c492c49c70143","lock":1,"ttl":1566297602}]},{"file":"\/var\/www\/html\/lib\/private\/Lock\/DBLockingProvider.php","line":185,"function":"initLockField","class":"OC\\Lock\\DBLockingProvider","type":"->","args":["files\/1a4f0fe49322fb91504c492c49c70143",1]},{"file":"\/var\/www\/html\/lib\/private\/Files\/Storage\/Common.php","line":715,"function":"acquireLock","class":"OC\\Lock\\DBLockingProvider","type":"->","args":["files\/1a4f0fe49322fb91504c492c49c70143",1]},{"file":"\/var\/www\/html\/lib\/private\/Files\/Storage\/Wrapper\/Wrapper.php","line":593,"function":"acquireLock","class":"OC\\Files\\Storage\\Common","type":"->","args":["files\/jxplorercsvconfig.txt",1,{"__class__":"OC\\Lock\\DBLockingProvider"}]},{"file":"\/var\/www\/html\/lib\/private\/Files\/View.php","line":1940,"function":"acquireLock","class":"OC\\Files\\Storage\\Wrapper\\Wrapper","type":"->","args":["files\/jxplorercsvconfig.txt",1,{"__class__":"OC\\Lock\\DBLockingProvider"}]},{"file":"\/var\/www\/html\/lib\/private\/Files\/View.php","line":2050,"function":"lockPath","class":"OC\\Files\\View","type":"->","args":["\/\/jxplorercsvconfig.txt",1,false]},{"file":"\/var\/www\/html\/apps\/dav\/lib\/Connector\/Sabre\/Node.php","line":378,"function":"lockFile","class":"OC\\Files\\View","type":"->","args":["\/\/jxplorercsvconfig.txt",1]},{"file":"\/var\/www\/html\/apps\/dav\/lib\/Connector\/Sabre\/Directory.php","line":153,"function":"acquireLock","class":"OCA\\DAV\\Connector\\Sabre\\Node","type":"->","args":[1]},{"file":"\/var\/www\/html\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php","line":1096,"function":"createFile","class":"OCA\\DAV\\Connector\\Sabre\\Directory","type":"->","args":["jxplorercsvconfig.txt",null]},{"file":"\/var\/www\/html\/3rdparty\/sabre\/dav\/lib\/DAV\/CorePlugin.php","line":525,"function":"createFile","class":"Sabre\\DAV\\Server","type":"->","args":["jxplorercsvconfig.txt",null,null]},{"function":"httpPut","class":"Sabre\\DAV\\CorePlugin","type":"->","args":[{"absoluteUrl":"http:\/\/cloud.....de\/\/remote.php\/webdav\/jxplorercsvconfig.txt","__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"\/var\/www\/html\/3rdparty\/sabre\/event\/lib\/EventEmitterTrait.php","line":105,"function":"call_user_func_array","args":[[{"__class__":"Sabre\\DAV\\CorePlugin"},"httpPut"],[{"absoluteUrl":"http:\/\/cloud.....de\/\/remote.php\/webdav\/jxplorercsvconfig.txt","__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]]},{"file":"\/var\/www\/html\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php","line":479,"function":"emit","class":"Sabre\\Event\\EventEmitter","type":"->","args":["method:PUT",[{"absoluteUrl":"http:\/\/cloud.....de\/\/remote.php\/webdav\/jxplorercsvconfig.txt","__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]]},{"file":"\/var\/www\/html\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php","line":254,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->","args":[{"absoluteUrl":"http:\/\/cloud.....de\/\/remote.php\/webdav\/jxplorercsvconfig.txt","__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"\/var\/www\/html\/apps\/dav\/appinfo\/v1\/webdav.php","line":80,"function":"exec","class":"Sabre\\DAV\\Server","type":"->","args":[]},{"file":"\/var\/www\/html\/remote.php","line":163,"args":["\/var\/www\/html\/apps\/dav\/appinfo\/v1\/webdav.php"],"function":"require_once"}],"File":"\/var\/www\/html\/3rdparty\/doctrine\/dbal\/lib\/Doctrine\/DBAL\/Driver\/PDOStatement.php","Line":141}},"CustomMessage":"--"},"userAgent":"Mozilla\/5.0 (Macintosh; Intel Mac OS X 10.14; rv:68.0) Gecko\/20100101 Firefox\/68.0","version":"16.0.4.1"}

Is this the first time you’ve seen this error? (Y/N): Y

The database is up and accessible from within the docker container, no problems on this side. Seems to be an issue with the code…