How to setup Postgres 13 WAL streaming replication on Ubuntu

Working with PostgreSQL Replication Slots replication slot does not exist does not exist If it already exists, it must be empty -S slotname --slot=slotname This option can only be used together with -X stream replication slot is active for pid The CREATE SUBSCRIPTION command would create the replication slot There must be something in your setup that you are not telling us

replication slot postgres You can't remove a subscription database definition if there are subordinate subscriptions Remove the subscriptions first Problem Subscription does not exist