Upgrade failure nextcloud 18.0.1 Synology NAS

Hi all,

I use nextcloud on my Synology NAS DS918+.
Currently it runs and i tried to update via via occ to 18.0.1.
After the comandsudo -u http php73 occ upgrade
appears this failure: Doctrine\DBAL\Exception\InvalidFieldNameException : An exception occurred while e xecuting 'UPDATE oc_flow_operationsSETentity= ? WHEREentity` = ‘’’ with params [“OCA\WorkflowEngine\Entity\File”]:

SQLSTATE[42S22]: Column not found: 1054 Unknown column ‘entity’ in 'where clause ’
Update failed`

I am a complete noob with Shell, linux etc. so i really need and hope for your help. I think, the problem can be solved easily, but yeah i have no idea.

Thank you in advance!

EDIT1/2/3: transfering my text/headline from german to english