Sometimes I get this errormessage when I am trying to save a page: Violation of PRIMARY KEY constraint 'PK_tblWorkProperty'. Cannot insert duplicate key in object 'dbo.tblWorkProperty'. The page is in a own pagetype with a own pagedefinitiontype and several predefine pagedefinitiontypes. I only get this error when there already is a version in the versionhistory that had not been published yet. Here is the errorstack: [SqlException (0x80131904): Violation of PRIMARY KEY constraint 'PK_tblWorkProperty'. Cannot insert duplicate key in object 'dbo.tblWorkProperty'.] System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) +859322 System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +736198 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +188 System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +1959 System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) +149 System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) +903 System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) +132 System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe) +415 System.Data.SqlClient.SqlCommand.ExecuteNonQuery() +135 EPiServer.DataAccess.AbstractCommand.ExecuteNonQuery() +12 EPiServer.DataAccess.PageSaveDB.SavePageVersionProperty() +544 EPiServer.DataAccess.PageSaveDB.CreateAndSave(SaveAction action, String currentUser) +278 EPiServer.DataAccess.PageSaveDB.Save(PageData page, SaveAction action, String currentUser) +419 EPiServer.LocalPageStore.Save(PageData page, SaveAction action, AccessLevel access) +353 EPiServer.DataFactory.Save(PageData page, SaveAction action, AccessLevel access) +546 EPiServer.DataFactory.Save(PageData page, SaveAction action) +313 EPiServer.Web.PageExtensions.SaveCurrentPage.SavePage() +65 EPiServer.PageBase.SavePage() +157 EPiServer.UI.Edit.EditPanel.SavePage() +143 EPiServer.UI.Edit.EditPageButtonControl.Save(SaveAction saveAction, Boolean goToViewPage) +49 EPiServer.UI.Edit.EditPageButtonControl.Save_Click(Object sender, EventArgs e) +11 EPiServer.UI.WebControls.ToolButton.OnClick(EventArgs e) +101 EPiServer.UI.WebControls.ToolButton.RaisePostBackEvent(String eventArgument) +132 System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11 System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5102 Anyone have any idea why?