When attempting to delete or remove a column (Flow State) from the Rally Team Board, a validation error appears indicating the state is still in use, even if the column appears empty.
The following error message occurs: Validation error: FlowState.[Name] is in use. Please remove all usages and try again.
Even if a column appears empty on the Team Board, background associations with hidden work item types or artifacts (specifically Risks) prevent the deletion of the Flow State.
Follow these steps to identify and clear associations: