Unfortunately that does not work either.
I dropped all wp_connections* tables on my live site.
I use the following settings (see screenshots):
On my Localhost everything is fine (example screenshot):
When importing directly the SQL via phpMyAdmin I never get error messages. When I use Duplicator, I do see error messages on missing indexes. The result is like this:
I have used Duplicator for a very long time now, and never had any problems. The first time I got this error I thought it was a glitch and used an older backup. The error now occurs very frequently. I cannot put my site online anymore (complete that is).
It does not seem to be related to Duplicator because I have the same end result with a direct SQL import. I have no clue what to do next.
If you need access to my site, I can give you full access. If you need money to fix this, please let me know. I am kinda desperate right now. We spent many many days manually checking all entries and typing them over in Connections.
Thanks in advance!