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An error occurred while attaching module (Dynamicweb.Frontend.Content)

System.Data.SqlClient.SqlException (0x80131904): Transaction (Process ID 85) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction.
   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
   at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
   at System.Data.SqlClient.SqlDataReader.TryHasMoreRows(Boolean& moreRows)
   at System.Data.SqlClient.SqlDataReader.TryReadInternal(Boolean setTimeout, Boolean& more)
   at System.Data.SqlClient.SqlDataReader.Read()
   at Dynamicweb.Forum.Message.GetMessagesBySql(String sqlCommandText, Boolean isThread)
   at Dynamicweb.Forum.Message.GetRepliesByThreads(MessageCollection threads)
   at Dynamicweb.Forum.Renderer.RenderMessage(Template template, Message message, String prefix, Boolean renderLastReply)
   at Dynamicweb.Forum.Renderer.RenderForm(Template template, Message post, Message thread, Category category, Boolean isEdited)
   at Dynamicweb.Forum.Frontend.CreatePost(Int32 categoryID, Int32 threadID, Int32 replyID, Boolean isInline)
   at Dynamicweb.Forum.Frontend.ShowThread(Message thread)
   at Dynamicweb.Forum.Frontend.GetContent()
   at Dynamicweb.Frontend.Content.GetModuleOutput(Paragraph paragraph, PageView pageview)
ClientConnectionId:e2674b84-9e1e-4d57-9de1-0eb9b3af071a
Error Number:1205,State:51,Class:13