Archiving Failed for Workorder : #####

Archiving Failed for Workorder : #####

Upon checking our System Log I noted many Archiving failures. Build 9317, MSSQL, on Server 2008R2. 

Probable Cause: Violation of PRIMARY KEY constraint 'Arc_WorkOrder_PK'. Cannot insert duplicate key in object 'dbo.Arc_WorkOrder'.

Please advise. 

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