Resolution: Cannot Reproduce
Affects Version/s: 1.9
Fix Version/s: 2.0
Detailed description, including backtrace dump, can be found here: http://forum.civicrm.org/index.php/topic,1604.0.html
When Organic group is created in a clean install (no other organic groups) the error message is raised. OG creates in Drupal but is not replicated into CiviCrm.
Drupal version: Drupal 5.3
OG version: 5.x-4.0
CiviCRM version: CiviCRM 1.9.11960, with OG CiviCRM Sync module enabled.
I'm running PHP5.2.3 and mysql 5.0.45