Issue Description

An error occurs when multiple K2 Servers attempts to complete a sync via the SyncEngine.

Error Message

The following error occurs and is visible in the hostserver log file: “Violation of PRIMARY KEY constraint 'PK_Identity_IdentityMember'. Cannot insert duplicate key in object 'Identity.IdentityMember'”.


  1. Ensure you have K2 Five (5.3) installed.
  2. Download the K2 Five (5.3) FP5 from K2 Partner and Customer Portal.
  3. Install the K2 Five (5.3) FP5 to apply the fix.