What is Replication slots in PostgreSQL Streaming

error_ replication slot is active for pid
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Postgres prevents active slots from being dropped If it does happen , PowerSync would

ERROR: executing recovery, execution of command failed at 1st stage pid 28665: LOG: starting recovering node 0 > 10:04

error 1089 Streaming replication has stopped: You get this error when streaming replication between the primary and replica instances breaks down In this case,

error_ draggable element must have an item slot ERROR: could not create replication slot sub1: ERROR: all ERROR: replication origin with OID 1 is already active for PID 5566