Error with replication slot getting full and invalidated during initial

PostgreSQL replication slot replication slot Creating a replication slotCreating a replication slot · Set the maximum WAL size for replication in the Max slot wal keep size setting The replication slot is active for pid PostgreSQL Streaming Physical Replication With Slots · Introduction · Create a sandbox with two PostgreSQL servers · Test table · Filling WAL

replication slot does not exist  postgresql_slot module