I want to update my system from 22.03.5 to 23.05.2, but auc does not work:
Running: 22.03.5 r20134-5f15225c1e on ramips/mt7621 (netgear,wax202)
Available: 22.03.5 r20134-5f15225c1e
Can someone give me a hint?
You are better off by downloading a normal release sysupgrade image and reinstalling manually the add-on packages. Or using imagebuilder to cook up a 23.05 image with your required packages.
There are some changes in the defaults packages between 22.03 and 23.05 and auc might not recognise the needed changes (and might try including wrong packages based on old release's selections).
Try specifying the build and release versions on the command line. I've done about 5-6 upgrades from 22.03 to 23.05 and they've worked fine (-ish for the mt7622). If it doesn't just work, then you can start afresh.
$ auc -b 23.05 -B 23.05.2