Thank you guys!
For whatever reason I even had a wrong charset/collation
MariaDB [nextcloud]> show variables like 'innodb_file_per_table';
+-----------------------+-------+
| Variable_name | Value |
+-----------------------+-------+
| innodb_file_per_table | ON |
+-----------------------+-------+
1 row in set (0.004 sec)
MariaDB [nextcloud]> SELECT @@character_set_database, @@collation_database;
+--------------------------+----------------------+
| @@character_set_database | @@collation_database |
+--------------------------+----------------------+
| latin1 | latin1_swedish_ci |
+--------------------------+----------------------+
1 row in set (0.002 sec)
MariaDB [nextcloud]> ALTER DATABASE nextcloud CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
Query OK, 1 row affected (0.001 sec)
MariaDB [nextcloud]> SELECT @@character_set_database, @@collation_database;
+--------------------------+----------------------+
| @@character_set_database | @@collation_database |
+--------------------------+----------------------+
| utf8mb4 | utf8mb4_general_ci |
+--------------------------+----------------------+
1 row in set (0.001 sec)
Without dowgrading to image: mariadb:10.5 or running with command --skip-innodb-read-only-compressed I run also into, when reprairing
docker-compose exec --user www-data app php occ maintenance:repair --include-expensive into:
- ERROR: An exception occurred while executing a query: SQLSTATE[22007]: Invalid datetime format: 1366 Incorrect string value: '\xF0\x9F\x8E\x82 V...' for column `nextcloud`.`oc_calendarobjects_props`.`value` at row 29