PhMemmel

``` Debug-Info: Transactions already disposed Error code: dmltransactionexception Stack trace: line 103 of /lib/dml/moodle_transaction.php: dml_transaction_exception thrown line 1969 of /mod/ratingallocate/locallib.php: call to moodle_transaction->rollback() line 382 of /mod/ratingallocate/locallib.php: call to ratingallocate->save_ratings_to_db()...