As we all know, SEDE is refreshed every Sunday morning, but immediately after it finished (Stack Overflow is the last site, always somewhere before noon UTC), it seems to have triggered a new refresh cycle, as this query shows:
(Solana is the newest site and hence the first one to be refreshed).
This query just lists the creation date of the database, but I spot checked a few other things (e.g. what time was the most recent post created) and that's consistent.
While it's nice to have a continually refreshing SEDE, I doubt this is intentional, and it would require me and some others to rewrite a couple of cross-database queries to filter out the temporary databases we can't access.
Now that we're at Sunday evening (UTC), the refresh cycle seems to have triggered another time.