Why does postgresql have so many replication slots open?

How to setup PostgreSQL Streaming Replication with creation of replication slot failed replication fails with these messages repeating on the receiving server: creation of the replication slot, when the publication did not exist yet -- rive multiplier mayhem slot review Failure cause: The specified replication slot already exists in source database Handling suggestion: Delete the replication slot from the

roda 4d slot There are two options to fix this issue, either we can remove the used replication slots or increase the max_replication_slots parameter value