Replication Error...

I have a SQL server which has the databases installed with transactional replciation enabled. I got an error which is mentioned below in my distribution agent history :-

Violation of PRIMARY KEY constraint 'PK__@.snapshot_seqnos__3647D946'. Cannot insert duplicate key in object '#3553B50D'.

Violation of PRIMARY KEY constraint 'PK__@.snapshot_seqnos__3647D946'. Cannot insert duplicate key in object '#3553B50D'.
(Source: FLORA\INSTANCE1 (Data source); Error number: 2627)
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Can anyone let me know the reason for the above mentioned error?

Thanks,
Santhosh.C.Your subscriber is not in sync with your publisher. If the database is not too big or you can shut down the app, go ahead and reinitialize the subscription to sync the replication.