In scenario where auto archiving is configured on Piwik where websites are added and removed frequently. If some websites are removed after archivization started the process will break with message An unexpected website was found in the request: website id was set to ***.

But if there was more than one website removed break will occur in next archiviation, because process will start with siteIds written in option table under key SharedSiteIdsToArchive and remove only one siteId, the one that will cause break.

If more sites are removed between archivizations the scenario will occur again and again.

So far solution I've found is to remove SharedSiteIdsToArchive value, but it is not possible to do it every time when this scenario occurs.

I think that such error An unexpected website was found (...) should be logged , but archiving process should continue to next website instead of exiting.