fix basebackup key cleanup

Author: kelvich

Diff for: src/pglogical_apply.c

@@ -1597,7 +1597,7 @@ MtmExecutor(void* work, size_t size, MtmReceiverContext *receiver_ctx)
 					PushActiveSnapshot(GetTransactionSnapshot());
 
 					rc = SPI_execute("delete from mtm.config where key='basebackup'", false, 0);
-					if (rc != SPI_OK_INSERT)
+					if (rc != SPI_OK_DELETE)
 						mtm_log(ERROR, "Failed to load node list");
 
 					if (SPI_finish() != SPI_OK_FINISH)