I have a nice simple spreadsheet that stands on its own. It is brand new.

Excel has now decided that it is linked to a spreadsheet that it so
unrelated to anything in the world, that I didn't recognise the linked file
as my own! This linked file is years old and hasn't been amended since its
creation years ago.

I confirm that no formula in the new spreadsheet refers to any other
spreadsheet.

How do I correct Excel's Edit Linkages box?

Many thanks for your help.