Adding a department member as someone who can edit our website

Hi,

I am resigning and therefore someone else needs to take over the responsibility of editing my department’s website. I have a coworker, Lukasz Bratasz, who is registered with the site and has been added as an administrator to the site. HOwever, when he tries to log in, he gets this message:

“PDOException: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry ‘Lukasz Bratasz’ for key ‘name’: UPDATE {users} SET name=:db_update_placeholder_0, pass=:db_update_placeholder_1, mail=:db_update_placeholder_2, theme=:db_update_placeholder_3, signature=:db_update_placeholder_4, signature_format=:db_update_placeholder_5, created=:db_update_placeholder_6, access=:db_update_placeholder_7, login=:db_update_placeholder_8, status=:db_update_placeholder_9, timezone=:db_update_placeholder_10, language=:db_update_placeholder_11, picture=:db_update_placeholder_12, init=:db_update_placeholder_13, data=:db_update_placeholder_14 WHERE (uid = :db_condition_placeholder_0) ; Array ( [:db_update_placeholder_0] => Lukasz Bratasz [:db_update_placeholder_1] => $S$DLrDsonuumZni96DLgjAcbs//Us.QMAgUUbWAEhrdQv4jODFQb5x [:db_update_placeholder_2] => lukasz.bratasz@yale.edu [:db_update_placeholder_3] => [:db_update_placeholder_4] => [:db_update_placeholder_5] => [:db_update_placeholder_6] => 1459893821 [:db_update_placeholder_7] => 0 [:db_update_placeholder_8] => 0 [:db_update_placeholder_9] => 1 [:db_update_placeholder_10] => [:db_update_placeholder_11] => [:db_update_placeholder_12] => 0 [:db_update_placeholder_13] => lb822 [:db_update_placeholder_14] => b:0; [:db_condition_placeholder_0] => 234 ) in drupal_write_record() (line 7106 of /data01/d7/ipch.yale.edu/includes/common.inc).