CI failing because db index names are to long

[juliusknorr]

+ ./occ app:check-code $APP_NAME -c strong-comparison
96s
182
Database schema error: Name of index deck_assigned_labels_label_id_index on table *dbprefix*deck_assigned_labels is too long (20), max. 27 characters + *dbprefix* allowed
96s
183
Database schema error: Name of index deck_assigned_labels_card_id_index on table *dbprefix*deck_assigned_labels is too long (20), max. 27 characters + *dbprefix* allowed
96s
184
Database schema error: Name of index deck_board_acl_board_id_index on table *dbprefix*deck_board_acl is too long (14), max. 27 characters + *dbprefix* allowed
96s
185
App is not compliant