Ken,

Excuse for intervening, 

I just started to have exactly the same issue.

I'm running DNN 7.3.2

My log reads:

ModuleId:321

ModuleDefId:63

FriendlyName:Site Management

ModuleControlSource:DesktopModules/Admin/Portals/Portals.ascx

AssemblyVersion:7.3.3

PortalID:0

PortalName:InteliBrain™

UserID:3

UserName:InteliBrainGRSuperUser

ActiveTabID:17

ActiveTabName:Site Management

RawURL:/en-us/Host/Site-Management/portalid/0

AbsoluteURL:/Default.aspx

AbsoluteURLReferrer:http://intelibrain.gr/en-us/Host/Site-Management/portalid/0

UserAgent:Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36

DefaultDataProvider:DotNetNuke.Data.SqlDataProvider, DotNetNuke

ExceptionGUID:ebbf7f97-324e-4347-9c08-d0feac27b519

InnerException:The DELETE statement conflicted with the REFERENCE constraint "FK_FolderPermission_Roles". The conflict occurred in database "InteliBrainGR", table "dbo.FolderPermission", column 'RoleID'. The statement has been terminated.

FileName:

FileLineNumber:0

FileColumnNumber:0

Method:System.Data.SqlClient.SqlConnection.

StackTrace:

Message:

DotNetNuke.Services.Exceptions.ModuleLoadException: The DELETE statement conflicted with the REFERENCE constraint "FK_FolderPermission_Roles". The conflict occurred in database "InteliBrainGR", table "dbo.FolderPermission", column 'RoleID'.
The statement has been terminated. ---> System.Data.SqlClient.SqlException: The DELETE statement conflicted with the REFERENCE constraint "FK_FolderPermission_Roles". The conflict occurred in database "InteliBrainGR", table "dbo.FolderPermission", column 'RoleID'.
The statement has been terminated.
   at System.Data.SqlClient.SqlConnection. (SqlException exception, Boolean breakConnection)
   at System.Data.SqlClient.SqlInternalConnection. (SqlException exception, Boolean breakConnection)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning()
   at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
   at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
   at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async)
   at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
   at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe)
   at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
   at PetaPoco.Database.Execute(String sql, Object[] args)
   at DotNetNuke.Data.PetaPoco.PetaPocoHelper.ExecuteNonQuery(String connectionString, CommandType type, Int32 timeout, String sql, Object[] args)
   at DotNetNuke.Data.SqlDataProvider.ExecuteNonQuery(String procedureName, Object[] commandParameters)
   at DotNetNuke.Data.DataProvider.DeletePortalInfo(Int32 PortalId)
   at DotNetNuke.Entities.Portals.PortalController.DeletePortalInternal(Int32 portalId)
   at DotNetNuke.Entities.Portals.PortalController.DeletePortal(PortalInfo portal, String serverPath)
   at DotNetNuke.Modules.Admin.Portals.Portals.OnGridDeleteCommand(Object source, GridCommandEventArgs e)
   --- End of inner exception stack trace ---

Should we expect the resolvement soon?

Is there any super safe way to do the deletions manually?

Is The issue open and unresolved since 2004?

Note: I'm watching DNN-4351, DNN-3831, DNN-5737 on JRA.

I guess no need to create a new Issue, or is there for the requests to grow?

Please advice.