CiviCRM Community Forums (archive)

I'm using version 2.0.4 and when I click on the link to Synchronize Users to Contacts in the Adminstrater CiviCRM area, I get the following message:

     Sorry. A non-recoverable error has occurred.

    DB Error: already exists

    Return to home page.

Error Details:

Array
(
    [callback] => Array
        (
            [0] => CRM_Core_Error
            [1] => handle
        )

    [code ] => -5
    [message] => DB Error: already exists
    [mode] => 16
    [debug_info] => INSERT INTO civicrm_uf_match (uf_id , uf_name , contact_id , domain_id ) VALUES ( 38 , 'email@domain.com' ,  37 ,  1 )  [nativecode=1062 ** Duplicate entry '37' for key 4]
    [type] => DB_Error
    [user_info] => INSERT INTO civicrm_uf_match (uf_id , uf_name , contact_id , domain_id ) VALUES ( 38 , 'email@domain.com' ,  37 ,  1 )  [nativecode=1062 ** Duplicate entry '37' for key 4]
    [to_string] => [db_error: message="DB Error: already exists" code=-5 mode=callback callback=CRM_Core_Error::handle prefix="" info="INSERT INTO civicrm_uf_match (uf_id , uf_name , contact_id , domain_id ) VALUES ( 38 , 'email@domain.com' ,  37 ,  1 )  [nativecode=1062 ** Duplicate entry '37' for key 4]"]
)

Any idea if this is a problem with a table entry that I should fix or if this is a bug?