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I'm testing the creation of user accounts on the new website and I get a general database error after attempting to create an account. The error log shows:

Sep 14 09:06:01 test drupal_www_example_com: https://test.example.com|1505379961|php|97.120.1.69|https://test.example.com/user/register|https://test.example.com/user/register|0||PDOException: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry 'user-203409-0-0-und' for key 'PRIMARY': INSERT INTO {field_data_field_name_first} (entity_type, entity_id, revision_id, bundle, delta, language, field_name_first_value, field_name_first_format) 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, :db_insert_placeholder_7); Array#012(#012
[:db_insert_placeholder_0] => user#012
[:db_insert_placeholder_1] => 203409#012
[:db_insert_placeholder_2] => 203409#012
[:db_insert_placeholder_3] => user#012
[:db_insert_placeholder_4] => 0#012 [:db_insert_placeholder_5] => und#012 [:db_insert_placeholder_6] => betachristia556#012 [:db_insert_placeholder_7] => #012)#012 in field_sql_storage_field_storage_write() (line 514 of /var/www/html/example/docroot/modules/field/modules/field_sql_storage/field_sql_storage.module).

I looked in the user table and there is no user for the ID 203409.

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The field_data_field_name_first field had some data stored in it for that user ID, apparently because it was migrated in at a later time than the user table or because I didn't drop the database before I imported new data. As a result, the system couldn't write to the database user table and field_data_field_name_first table. The solution was to do a fresh import of the user table and the first and last name custom fields.

This was on a test site.

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