Hi Bront,

This looks like it might be a LabKey Server version mismatch issue.

The upgrade from 12.3 to 13.1 renames the "DbSchemaName" column on the query.ExternalSchema table to "SourceSchemaName".

Is it possible that you're attempting to run version 12.3 against a database that's already been upgraded to 13.1?

Thanks,
Josh