I'm running into some issues with updating my 'Owners' (in this case it's binded to a datatable of Locations).

DataTable - Locations

LocationID, LocationName, SortOrder, ... 

The BindingSource is bound to the locations table with the LocationID as the key and sorted by the SortOrder.

Now, when I try to change the SortOrder while the calenderInfo is bound, it gives me an error:

Owner Data Binding Error

There is already an Owner with a Key of '2'. Owner keys must be unique.

I don't understand why I get this error when i'm not changing any of the ID's, only their SortOrder.

I've also tried to clear the CalenderInfo bindings for owners, however when I try that, I get this Error:

 System.NullReferenceException: Object reference not set to an instance of an object.

Anyone have a solution?