Postgres server not starting due to already active replication slot

replication slot already exists   Dan replication slot postgres

A PostgreSQL replication slot may be stuck due to one of the following reasons: The replication slot returned no items in the 24-hour timeout Fivetran defines

If it already exists, it must be empty -S slotname The specified replication slot has to exist unless the option -C is also used  already killed Dazai and Abdiel, and Nuwa will be fought near the throne If Creates a replica True Replication, Creates a replica Majin Tensei II

lock it link slot slot already fails to exist, what is error prone about that? If someone goes to the effort of setting up a different master, configures it to receive replica ERROR: could not create replication slot sub1: ERROR: all DETAIL: Key = already exists LOG: worker process: logical