I've got a bit of a baffling issue and I'm not sure where to begin looking for fixes.

I have begun to notice several instances where I have several contacts that share a single Drupal user account. These are contacts who are clearly not the same person and have no business sharing a single Drupal account.

Edited to add:

  • I'm using CiviCRM 4.6.8 and Drupal 7
  • None of the contacts share the same email address
  • Contacts are not synced via rules
  • We have recently opened registrations for 2 very large events. The merge rule we're using is supposed to sync contacts on name and email address
  • There is a profile used for site registrations. We collect name, email address, phone number, address, etc.

Any idea what might cause this to happen?

  • are you saying that eg cid 12 and cid 15 are both linked to uid 5?
    – petednz - fuzion
    Sep 15, 2015 at 19:34
  • Yes, that exactly. There are several instances of of several CIDs sharing a single UID. Sep 15, 2015 at 19:43
  • Can you share a little more about your Drupal setup? Do you have any modules enabled that sync users to contacts (via a rule or otherwise)? Do you have a profile enabled that is used for Drupal registration? Do you use the Webform integration module at all for sign ups of any kind? Sep 15, 2015 at 20:02
  • Also, what version of Civi are you using? Sep 15, 2015 at 20:03
  • Another thought too, have you recently used Synchronize Users to Contacts (under Administer > Users and Permissions)? Sep 15, 2015 at 20:10

1 Answer 1


I'm not sure what is causing the contacts to share Drupal accounts, but to detach contacts from Drupal user accounts, you will need access to the civicrm_uf_match table in your CiviCRM database.

See the question How to disconnect civi contact record from Drupal user? and the answer I posted there on how to detach contacts.

  • 1
    Just wanna say that I'm extremely grateful for the API explorer right now. Sep 16, 2015 at 13:32
  • Curiosity here, how are you using the API explorer to fix it? Sep 16, 2015 at 15:59
  • 2
    I'm using the API explorer using entity "UFMatch" and action "Get" to find an afflicted contact by ID. Make note of the UFMatchID, then use a "Delete" action to delete that row by corresponding ID. Seems to work. Sep 16, 2015 at 16:43
  • Brilliant! Great solution. Sep 16, 2015 at 18:02

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