Dispose issue with Keyword event receiver

Event Id

Level

Message

nase

Verbose

ERROR: request not found in the   TrackedRequests. We might be creating and closing webs on different threads.   ThreadId = 8, Free call stack =    at  

Microsoft.SharePoint.SPRequestManager.Release(SPRequest   request)    

at Microsoft.SharePoint.Library.SPRequest.Dispose(Boolean   disposing)     at   Microsoft.SharePoint.Library.SPRequest.Dispose()     at

nask

Monitorable

An SPRequest object was not   disposed before the end of this thread.  To avoid wasting system   resources, dispose of this object or its parent (such as an SPSite or SPWeb)  

as soon as you are done using it.  This object will now be   disposed. 

Allocation Id: {FEAF7C50-55FE-4778-BCB8-8FFA68EC5D34}    To determine where this object was allocated, set

  Microsoft.SharePoint.Administration.SPWebService.ContentService.CollectSPRequestAllocationCallStacks   = true.