If you don’t provide output it is hard to guess the problem. But potential suspects are the improperly added repos 4 and 12. Enable auto refresh and retry the upgrade.
You have a lot of repos active, and not many priorities set for them. If some of those repos are redundant (MEGAsync from New Zealand?), and they are out of sync, very weird things may happen.
You might want to disable some of them that might contain packages that are also in the standard Tumbleweed repos and then try to update again.
You might also consider using Myrlyn and its “Repositories” view to get an idea what’s in each of those repos. It can also do the “dup” for you.
And BTW having both “Packman” and “Packman Essentials” is redundant; “Packman Essentials” is a subset of “Packman”. You can remove that repo without any loss.
Also, check free disk space at /varto make sure you have enough for all the package downloads.