offiziellecharts.de has changed its URL structure. So all the external links to this whitelisted site are broken.
They only added a “/charts” in the URL, f. e.
old: ~.offiziellecharts.de/album-details-483945
new: ~.offiziellecharts.de/charts/album-details-483945
Is there a chance to change all external links to this site at once? Must be several thousands …
How does a large organization do this and not even leave a redirect behind in 2024 
I will work on this: MBS-13684 / MBBE-88
Around four thousand, yes. Will do it with a bot.
Thanks for mentioning. I just reported it to them by mail as there isn’t much documentation about their link format on their website.
GfK Entertainment replied. URLs should redirect now
Really great, thank you!
Now: Could the new format also be whitelisted as external database?
Yes, @reosarevok prepared a code change for this purpose already. Start watching MBS-13684 if you want to be notified of progress.