TF26061: ‘[Reference Name]’ is not a supported reference field name.
I just got this error after copying and pasting a reference name from an email to the TFS WIT Editor.
There might be other reasons for getting this exception, but the reason I got it was because TFS doesn’t trim whitespace from the Referenced Field Name field. I accidentally pasted "MSN.LSE.ITR "….notice the space at the end.
Delete that space from the end of the Reference Name field, save and you shouldn’t get that error anymore. If you do, it is for other reasons.