Consider the following scenario. You create an organizational unit (OU) in the Active Directory directory service on a Microsoft Windows Server 2003-based computer. Then, you try to assign an Internet Protocol security (IPsec) policy to the Group Policy object (GPO) of the new OU before this OU is fully replicated. In this scenario, you receive the following error message:
A constraint violation occurred.
This symptom occurs when you are working on a domain controller that is not in the same domain as the primary domain controller (PDC) emulator. Therefore, replication is not immediate.