There is this Excel file I made, it has no macros or any such things, it's just all formulas, and I copied some data into it from various sources (ERP Excel export, copy-pasting from web applications...), but now I get the well-known privacy warning every time I save the file - or when it auto-saves. Which is very annoying.
I know it is possible to disable the warning on my computer (How can I prevent the privacy warning in Excel?) but it does not explain what caused it to appear (other files I made are fine), and I cannot reasonably tell all the people I have to send this file to in a professional environment to go and tweak their settings just for my file not to annoy them...
Is there any way I can find what causes this warning to appear? I have no macro, no XML, web, or any other external data sources...