Locate the run_id for the run. In the following example, this is "123456".
Execute this query to find out if there is any run_history data for the run:
select * from run inner join run_history on run.oid = run_history.run_id where run.oid = 123456
You may find that there is no history for the run and then you delete the record from the run table:
delete from run where oid = 123456
There are no side effects of deleting this record. It seems that this record in this state should have been removed from the run table since it will not be picked up by the orphaned run monitor thread.