Hello,

I've performed a successful upgrade (no errors) from 5.6.3 to 6.0.1
Now en exception happens when I browse to Host > Host Settings.
It's not this problem: http://www.dotnetnuke.com/Resources/F...
There are no skin duplicates, and this is on the Host Settings, not Admin Settings. 

The exception is:

Error: Host Settings is currently unavailable. DotNetNuke.Services.Exceptions.ModuleLoadException: An item with the same key has already been added. ---> System.ArgumentException: An item with the same key has already been added. at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource) at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add) at System.Linq.Enumerable.ToDictionary[TSource,TKey,TElement](IEnumerable`1 source, Func`2 keySelector, Func`2 elementSelector, IEqualityComparer`1 comparer) at System.Linq.Enumerable.ToDictionary[TSource,TKey,TElement](IEnumerable`1 source, Func`2 keySelector, Func`2 elementSelector) at DotNetNuke.Entities.Modules.ModuleControlController.GetModuleControlsByModuleDefinitionID(Int32 moduleDefID) at DotNetNuke.Modules.Admin.Host.HostSettings.BindData() at DotNetNuke.Modules.Admin.Host.HostSettings.OnLoad(EventArgs e) --- End of inner exception stack trace --


Any ideas?

Thanks,
Horacio.-

Hi Cathal,

For now, the client decided to keep the site running on 5.6.3.
Later, when they decide to move to 6.x, I may have to do what you suggest. 

From the exception, what seems to be failing is this:

I really dislike linq, Specially when it fails. It's too cryptic (for me)...
"An item with the same key has already been added.". What could that mean on the give expression? I don't know, I'm too old to understand linq.
Duplicate ControlKeys?

Many thanks,
Horacio.-

whoops, that query should not have controltitle as it's not evaluated as part of the linq statement, so instead try:

select count(*) as dupcount,moduledefid,controlkey from dnn_modulecontrols group by moduledefid,controlkey order by dupcount desc

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