FKV deleted but customization still looking for it

ver 10.2.600.14

I added an FKV to a customization, then ‘deleted’ it.
However the ‘personalizeCustomizeManager.CallAddForeignKeyView’ still exists for this now defunct FKV, so when I open the customized form, I get the infamous ‘Object reference not set to an Instance of an Object’, since there is no FKV to ‘call’.

I can’t re-add the same FKV since it ‘thinks’ it already exists, bombs out the customization completely.

Do I have any chance of fixing this somehow?
When I open the customization in ‘xml’ the code that is ‘read-only’ is not available, so I cannot comment out that ‘CallAddForeignKeyView’. Thanks folks.

I was able to delete thru the ‘custom XML Editor’, which I had never used before.