Validation error: FlowState.Name Not Needed is in use. Please remove all usages and try again - when trying to remove a Flow State from the Team Board

Products

• CA Agile Central SaaS (Rally)

Issue/Introduction

We have a project Team Board using Flow Status showing a "Validation error: FlowState.Name Not Needed is in use. Please remove all usages and try again." when trying to delete the flow state. There are no work items in the state they we can see. Maybe a deleted work item? 

Resolution

The Flow States that the user couldn't find were found on some Risks.  

To find this,

• I used the Plan > Work Views board
• Selected 4 Work Item Types - User Story, Defect, Defect Suite, Risk, Test Set (Flow State is only found on these Work Items)
• Show fields (Include Flow State)
• Filtered for Flow State = Pre Prod (this is what I was trying to delete when I received the error)
• See the Risk and all other artifact types associated with the Flow State.
• Change the Flow State for the Risk to something else 
• Delete the Flow State.