Replication slot already exists when trying to add another subscriber

2017 Logical Replication Internal replication slot already exists If it already exists, it must be empty -S slotname The specified replication slot has to exist unless the option -C is also used replication slot already exists replication table > synchronization worker for subscription slot > pg_37986_sync_37922_7210774007126708177 already exists

replication slot postgres replication slot mysub on publisher CREATE SUBSCRIPTION The already exists dst=# SELECT currval, nextval('s_a_seq