Who has last initialized the administrative tables, who is making all the changes, and who is expected to either commit or re-initialize (ABORT-TRANSACTION). The value of tRPAdminOwner is set when tRPAdminControlApply is set so that other users will be advised to not make changes to the Admin tables. Agent sets tRPAdminOwner to empty string after tRPAdminControlApply is set - either by user initializing or committing, or by agent timing out the uncommitted transactions (tRPAdminLastSetTimer).