Hi All,

I am getting an exception 

USER_DEBUG [6]|DEBUG|System.DmlException: Upsert failed. First exception on row 0; first error: DUPLICATE_VALUE, duplicate value found: <unknown> duplicates value on record with id: <unknown>: []

when I am trying to insert an EntitySubscription  record

EntitySubscription en=new EntitySubscription(NetworkId = commId, SubscriberId = sid, ParentId = pid);
try{upsert en;}catch(Exception e){System.debug(e);}

I checked for duplicate records but there are no duplicate i could find in workbench

Thanks