Why you said on Telekom Deutschland's last edit there's should, at least, one non-SVG image while our admins said otherwise (did you even read the guidelines?). You aren't even an admin and always edited the page without regarding the standard on guidelines (e.g. Telia Company and Telekom's one) and stated your own rules but it's actually against the actual rules. This is my second warning to you: Be respectful and I'll pay you back. Thank you.
Okay. Restore the SVG. Then the page will not have any thumbnail in the dynamic category view. That is a minor price to pay. At least this will prevent the usage of SVG needed templates. I will leave it to you at this point. Let every image be an SVG hereafter.