As the error message says, your query was aborted due to it conflicting with recovery. There are many ways to deal with that. You could enable hot_standby_feedback on the replica. You could disconnect the replica from the master for the time the COPY takes (reset primary_conninfo). You could increase max_standby_streaming_delay. Perhaps you could also wrap the COPY operation in pg_wal_replay_pause() / pg_wal_replay_resume().
I'm frequently facing the below error while performing backup. Someone please tell how solve this issues.
Failed : pg_dump: error: Dumping the contents of table "botsession" failed: PQgetResult() failed. pg_dump: error: Error message from server: ERROR: canceling statement due to conflict with recovery DETAIL: User query might have needed to see row versions that must be removed. pg_dump: error: The command was: COPY public.botsession (id, userid, data, iscompressed) TO stdout;