FIM 2010 Sync not running with status "Stopped-extension-dll-exception"

we are getting the following error for all our extensions when trying to run the Sync Operations. All extensions have similar errors with event ID 6159 generated in the application event log. They all started occurring after I deleted a attribute flow rule in one of the agents. This is happening in Production and are facing lot of other issues because of this.

The management agent "Peoplesoft" failed on run profile "Full Import Full Synch" because of a problem with the initialize method on the extension object. The extension dll is "PeoplesoftExtension.dll" and the stack trace is:

Microsoft.MetadirectoryServices.UnexpectedDataException: String or binary data would be truncated.

The statement has been terminated.

   at Mms_ManagementAgent_PeoplesoftExtension.ExtFunctions.RunSQLCommand(String commandstring)

   at Mms_ManagementAgent_PeoplesoftExtension.ExtFunctions.AddSentEmailsRecord(String sAMAccountName, String MessageSubject, String MessageBody, Int16 DelayDays)

   at Mms_ManagementAgent_PeoplesoftExtension.ExtFunctions.CheckDoNotDisableInactiveGroup()

   at Mms_ManagementAgent_PeoplesoftExtension.ExtFunctions.LoadConfigSettings()

   at Mms_ManagementAgent_PeoplesoftExtension.ExtFunctions.InitializeCommon()

   at Mms_ManagementAgent_PeoplesoftExtension.MAExtensionObject.Initialize()

Only Full Import(Staging ONLY) is successful.