The version code "one behind" issue is currently breaking both auc and FS, both LuCI ASU and owut should work (for different reasons). The best description of the current issue I can come up with is here: https://github.com/openwrt/asu/issues/853#issuecomment-2265311030
If you are able (snapshot only) and want to try owut, see Owut: OpenWrt Upgrade Tool - #85 by efahl