The thread you linked to contains an error:traffic_source.source is *not* the session source - it contains the user acquisition source. (so the first session source of this user)The solution to OP is simple:Query `session_traffic_source_last_click.cr...

You can do as described.Like mentioned: "start execution" from within your workspace will overwrite to the live (production) tables by default.Go to Settings in the top nav bar of your RepositoryUnder "Workspace compilation overrides", click EditFill...