pisnapmgr error

All,

   I saw this error message for one of the tags on our production system:

[Server] XXXX [ID] 2134 [Time] 6/6/2014 4:20:48 AM [Program] pisnapss [Priority] 10 [ProcessOSUser] SYSTEM [ProcessID] 4896 [Severity] Error [Source1] pisnapmgr
Postevent failed: [-109] Value at This Time Already Exists
 Point ID: 9065, Connection ID: 36, User: piadmin, User ID: 1, mode: noreplace
 Event time: 6-Jun-14 03:15:04, value: 10.625

Any idea why I am seeing this error? This point is getting current value.

Thanks,

Arti