title: How to fix `column "xlog_position" does not exist` error when using AWS DMS for Postgres to Postgres data migration
body: <p>I'm trying to migrate and synchronize a PostgreSQL database using AWS DMS and I'm getting the following error.</p>
  
  <pre><code>Last Error Task error notification received from subtask 0, thread 0 [reptask/replicationtask.c:2673] [1020487] 
  RetCode: "SQL_ERROR SqlState: 42703 NativeError: 1 
  Message: ERROR: column "xlog_position" does not exist; No query has been executed with that handle; RetCode: SQL_ERROR SqlState: 42P01 NativeError: 1 
  Message: ERROR: relation "pglogical.replication_set" does not exist; No query has been executed with that handle; RetCode: SQL_ERROR SqlState: 42703 NativeError: 1 Message: ERROR: column "xlog_position" does not exist; No query has been executed with that handle; 
  Could not find any supported plugins available on source; Could not resolve default plugin; Could not assign a postgres plugin to use for replication; Failure in setting Postgres CDC agent control structure; Error executing command; Stream component failed at subtask 0, component st_0_JX7ONUUGB4A2AR2VQ4FMEZ7PFU ; Stream component 'st_0_JX7ONUUGB4A2AR2VQ4FMEZ7PFU' terminated [reptask/replicationtask.c:2680] [1020487] Stop Reason FATAL_ERROR Error Level FATAL
  </code></pre>
  
  <p>I'm using two PostgreSQL instances as both source and target. I have already tested and verified that both database instances are accessible by replication instance. Target instance user has full access to the database. Do I need to install any plugins or do additional configurations to get this migration setup working?</p>