Cost Element cannot be entered if cost center/activity type is entered

Hi all

I have an issue with a line in the Financial Planning Settings.

I have a line I accidentally mapped to both cost element and cost center. Somehow this was saved, but when I try to delete it I get the error message: "Cost Element cannot be entered if cost center/activity type is entered".

I can't move on until I get this line deleted as it interferes if I need to change or delete other lines.

So how can I delete this line?

Please see attached dump

br,

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