When for any reason you used an AD_Element foreign key for your plugins - the process Synchronize Terminology is throwing foreign key errors because is trying to delete AD_Element records referenced by your plugin tables.
In terms of extensibility, deleting these records is not a good idea, it is restricting potential usage of AD_Element table.
Major
When for any reason you used an AD_Element foreign key for your plugins - the process Synchronize Terminology is throwing foreign key errors because is trying to delete AD_Element records referenced by your plugin tables.
In terms of extensibility, deleting these records is not a good idea, it is restricting potential usage of AD_Element table.