Class identifier {value} (class name {object name}) is part of a circular inheritance hierarchy. This class references itself either as a superclass or an auxiliary class. Inheritance ignored.

Details
Product: Exchange
Event ID: 1150
Source: MSExchangeSRS
Version: 6.0
Component: Site Replication Service
Symbolic Name: DIRLOG_SCHEMA_CIRCULAR_INHERIT
Message: Class identifier {value} (class name {object name}) is part of a circular inheritance hierarchy. This class references itself either as a superclass or an auxiliary class. Inheritance ignored.
   
Explanation
A schema object is corrupted. The schema is a collection of properties for objects in the directory.
   
User Action
Stop and restart the Site Replication Service. If the error persists, restore the directory database from a backup, or contact Microsoft Product Support Services.

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