LR Classic: Change Settings for Lightroom Synchronisation

[Geblitzdings - Andreas]

I have two Lightroom Classic catalogs, A and B.
For a long time, I synchronized catalog A with the Lightroom Cloud.
Then I entered the cloud synchronization credentials for catalog B as well, because I didn't know I was only allowed to synchronize one catalog.
Now, every time I start catalog B, I get a message saying I'm only allowed to synchronize with one catalog and a question asking if I want to synchronize catalog B. The options are "Cancel" or "Yes, synchronize this catalog instead."
I want to continue synchronizing catalog A and not synchronize catalog B. "Cancel" isn't final, though. I get a message again the next time I start it. How can I prevent this? I was able to enter the credentials in the Lightroom synchronization settings, but there's no way to remove them.

[moved from bugs to discussions according to the community rules - Mod.]

[JohanElzenga]

Open the catalog folder of catalog B and delete the file with 'Sync' in its name (I can't remember the exact file name and I can't check it because I type this on my iPad). Lightroom Classic will rebuild it and the repeating question should no longer show.

[richardplondon]

Windows user here: on my PC this item presents as a subfolder.

it's found in the same location as [Catalogname].lrcat - the Catalog itself - and named  "[Catalogname] Sync.lrdata".

[JohanElzenga · Accepted solution]

Yes, that is the one. Delete it and the problem should be solved.

[Geblitzdings - Andreas]

Thank you guys, works like a charm!