Content Migrate fails for nodes with revisions

Some users have reported errors like (#781088-111: Updating CCK Fields and Data from D6 to D7)

An AJAX HTTP error occurred. HTTP Result Code: 500 Debugging information follows. Path: /batch?id=8285&op=do StatusText: Service unavailable (with message) ResponseText: PDOException: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry 'node-2381-0-0-und' for key 'PRIMARY': INSERT INTO {field_data_field_hon_id} (entity_type, bundle, entity_id, revision_id, language, delta, field_hon_id_value) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6); Array ( [:db_insert_placeholder_0] => node [:db_insert_placeholder_1] => continuouspublication [:db_insert_placeholder_2] => 2381 [:db_insert_placeholder_3] => 7723 [:db_insert_placeholder_4] => und [:db_insert_placeholder_5] => 0 [:db_insert_placeholder_6] => CP00002 ) in drupal_write_record() (line 6776 of /Users/cnolle/Desktop/dev/cope7/includes/common.inc).

in the content migrate module.

I've had this error as well on nodes which have several revisions. I think we should only be inserting the most-recent revision into field_data_field_NAME, instead of all revisions.