Thanks for your reply.
Sadly, reinstalling the plugin doesn’t work.
Ater the reinstall i get the following error in the server log:
{"timestamp":"2023-01-09 11:44:51.088 +01:00","level":"error","msg":"Unable to activate plugin","caller":"app/plugin.go:183","plugin_id":"focalboard","error":"error initializing the DB: Error 1054: Unknown column 'dirty' in 'field list' in line 0: SELECT version, dirty FROM `focalboard_schema_migrations` LIMIT 1"}
For the 2 SQL-Statements i get the following results:
show tables like “flocalboard%”;
+------------------------------------+
| Tables_in_mattermost (focalboard%) |
+------------------------------------+
| focalboard_blocks |
| focalboard_blocks_history |
| focalboard_board_members |
| focalboard_boards |
| focalboard_boards_history |
| focalboard_file_info |
| focalboard_notification_hints |
| focalboard_schema_migrations |
| focalboard_sessions |
| focalboard_sharing |
| focalboard_subscriptions |
| focalboard_system_settings |
| focalboard_teams |
| focalboard_users |
+------------------------------------+
select * from focalboard_schema_migrations;
+---------+-------------------------+
| Version | Name |
+---------+-------------------------+
| 1 | init |
| 2 | system_settings_table |
| 3 | blocks_rootid |
| 4 | auth_table |
| 5 | blocks_modifiedby |
| 6 | sharing_table |
| 7 | workspaces_table |
| 8 | teams |
| 9 | blocks_history |
| 10 | blocks_created_by |
| 11 | match_collation |
| 12 | match_column_collation |
| 13 | millisecond_timestamps |
| 14 | add_not_null_constraint |
| 15 | blocks_history_no_nulls |
| 16 | subscriptions_table |
| 17 | add_file_info |
+---------+-------------------------+