Successul upgrade but issues with layout copy and edit

Dear Community,
We have upgraded our on-premise Debian installation from 3.3.0 to 3.3.4, with lots of problems concerning the scripts that upgrade the dbase. We resolved the errors and got to a successful installation, only to find that (after a week) we were not able to copy layouts and edit them. (Produces an "unknown error, please contact administrator).
We proceeded in upgrading to v3.3.5, with no issues at this time, but problem persists. We are trying to debug this by putting the server in test mode and looking at the logs, and only this problem persists :

SQLSTATE[42S22]: Column not found: 1054 Unknown column ‘parentCampaignId’ in ‘field list’

(even though we have such a column in table campaign)

Can you please advise how to proceed? It is impossible to revert to the 3.3.0 version due to several layout changes so we need to repair the database. Are there any scripts to check its consistency?

Thank you,
Ted Tsoukas