Hi,

I was working on the cck fields migration from Drupal 6 to Drupal 7 using cck module. But whenever I tried to migrate the fields under 'Contact' content type, I am getting this error:

An AJAX HTTP error occurred. HTTP Result Code: 500 Debugging information follows. Path: /d7alpha/batch?id=147903&op=do StatusText: Service unavailable (with message) ResponseText: PDOException: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry 'node-117-0-0-und' for key 'PRIMARY': INSERT INTO {field_revision_field_first_name} (entity_type, bundle, entity_id, revision_id, language, delta, field_first_name_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] => author [:db_insert_placeholder_2] => 4 [:db_insert_placeholder_3] => 117 [:db_insert_placeholder_4] => und [:db_insert_placeholder_5] => 0 [:db_insert_placeholder_6] => Robert Olen ) in drupal_write_record() (line 6888 of /home/nidhi/public_html/d7alpha/includes/common.inc).

I was able to successfully migrate all the fields from other content types. Only the fields under 'Contact' content type is showing this error.

Can anyone suggest a solution for this problem?