Category talk:Pages using duplicate arguments in template calls

What's the purpose of this category?
I've been seeing this category on several pages recently, such as Dalek, Overseer (Planet of the Ogrons) and Last Great Time War. Could somebody please explain what this is supposed to mean? I have no idea what it means from the title or the page itself. CyberFoundries900 ☎  22:41, 25 November 2020 (UTC)
 * I think it's pretty cleary his is one of those automatically-generated categories marking out tech problems — like "Pages with broken image links" or what have you. Not sure what "using duplicate arguments in template calls" means in plain English, but presumably it means there's something wrong with the page's source code, somewhere in the general area of the templates. Scrooge MacDuck ☎  22:55, 25 November 2020 (UTC)
 * I tried to create an actual page for this category with an explanation, but now there's a big red message. It seems like it will be fixed automatically but I hope I didn't mess things up... Chubby Potato ☎  09:26, 5 January 2021 (UTC)