Primary Adamantium cannot be broken in the same manner.
I don't buy that 'indestructible' tag one bit. Anything can be broken, its just a matter of going high enough up the food chain.
The Destroyer and Cap's Shield are tougher than Adamantium (IMO) and those have been damaged.
If Adamantium was 'all that' then EVERY single advanced civilization would be using it for EVERYTHING. But apparently every advanced civilization in Marvel uses inferior metallurgy including the Celestials.
Most Adamantium that has been damaged is secondary Adamantium which isn't as strong
I have my own opinions on Adamantium and its Secondary 'cousin'.
I agree with the Busiek explanation that if something only has one 'schtick' (ie. Adamantium - it can't be damaged) then that should be respected. I'm not saying Adamantium should be easily destroyed, but its nonsense that its infinitely better than advanced alien metals.
Hulk ripped ultimate wolverine in half. So did ultimate colossus. Ultimate universe Adamantium doesn't have anywhere near the level of feats 616 does and regarded to not be as strong. Some think he merely ripped the joints and not the actual metal as how else could wolverine put himself back together.
Simply more evidence Wolverine needs to die in my opinion.