Automatic update of External links has been disabled

I am new to Linux, using at present KDE Neon Plasma 5.20.3 (moved after 30 years of using Windows).
This just started showing up recently in Calc.
When I check Edit->Link it has in it an endless line:
file:///home/alexe/desktop/home/alexe/desktop/home/alexe/desktop…

Looks to me that it is stuck in an endless loop within itself.
I didn’t / don’t want to link and update any external files

Not clear what to do about it and how to get rid of that?

My version of L.O is 6.4.6.2

Thanks
Alex

And Edit -> Link to External Files... -> Button: Break Link doesn’t fix this?