This is the error Message I received when upgrading from 2016.0.0864 to 2018.3.1162. However
I ran check links on all tables in the database before launching the upgrade and there were no problems. I restored back to the backup point 2016.0.0864 and tried again and got the same error. It indicates there is a temp table that needs to be removed and I don't know what that would be or how to remove it.
Sidenote: The error indicates the table is trying to update to 18.3.1162 however when I launch GP the version shows 18.5.1635.
Is there anyone that can help?