Since you are running snapshot builds, you'll be seeing this error a lot as the package ABI versions change (until we get apk fixed and add some code to the ubus call rpc-sys packagelist). You need to manually uninstall libubox20241219, as its ABI version has changed from 20241219 to 20240329, and the apk database does not yet contain the information required for the ASU system to know this (lots more details on the ABI version issue over on the owut thread).
If you find you cannot do this in LuCI ASU, you can use either owut upgrade --remove libubox20241219 on the device, or do an external build with Firmware Selector using an appropriately crafted package list.