Nextlcoud Update auf 20.0.2

Hallo Leute,

ich habe die Nextcloud Version 19 installiert. Ich wollte diese über den CLi-Befehl “sudo -u www-data php /var/www/nextcloud/updater/updater.phar” updaten. Dass funktioniert soweit bis zu occ upgrade kommt.

Dann kommt diese Fehlermeldung
"Should the “occ upgrade” command be executed? [Y/n] y
Nextcloud or one of the apps require upgrade - only a limited number of commands are available
You may use your browser or the occ upgrade command to do the upgrade
2020-12-04T13:24:25+00:00 Setting log level to debug
2020-12-04T13:24:25+00:00 Repair step: Repair MySQL collation
2020-12-04T13:24:25+00:00 Repair info: Not a mysql database -> nothing to do
2020-12-04T13:24:25+00:00 Repair step: Repair SQLite autoincrement
2020-12-04T13:24:33+00:00 Repair step: Copy data from accounts table when migrat ing from ownCloud
2020-12-04T13:24:34+00:00 Repair step: Drop account terms table when migrating f rom ownCloud
2020-12-04T13:24:34+00:00 Updating database schema
2020-12-04T13:24:35+00:00 Updated database
2020-12-04T13:24:35+00:00 Updating …
2020-12-04T13:24:38+00:00 Doctrine\DBAL\Exception\NotNullConstraintViolationException: An exception occurred while executing ‘INSERT INTO oc_activity_mq (mail_id, amq_timestamp, amq_latest_send, amq_type, amq_affecteduser, amq_appid, amq_subject, amq_subjectparams, object_type, object_id) SELECT mail_id, amq_timestamp, amq_latest_send, amq_type, amq_affecteduser, amq_appid, amq_subject, amq_subjectparams, object_type, object_id FROM __temp__oc_activity_mq’:

SQLSTATE[23000]: Integrity constraint violation: 19 NOT NULL constraint failed: oc_activity_mq.amq_subjectparams2
2020-12-04T13:24:38+00:00 Update failed
2020-12-04T13:24:38+00:00 Maintenance mode is kept active
2020-12-04T13:24:38+00:00 Resetting log level"

Wie kann ich diesen beheben?

Schonmal danke und lg
platofan