Looks like uploading core-admin-client v4.3.27 (r4.3) · Issue #6369 · QubesOS/updates-status · GitHub to the stable repository was premature… This needs matching core-admin v4.3.41 (r4.3) · Issue #6370 · QubesOS/updates-status · GitHub, but this one has still some issues, so it isn’t suitable for stable upload.
The update issue should be fixed in few hours (after buggy package is removed from the stable repo).