It doesnt smell like mold does it?
Im no expert...but if I had butter in the freezer 6 months, and it was always frozen, if it looked and smelled ok I'd slam it, you can always reboil it too
That looks kinda sketch, but if theres no mold on it, maybe reboil...hopefully someone else will give you a better answer I dont want you to get botulism bro
If I were you I would get a cup or two of hot water and stir it in the butter.
Then pour the butter water mixture in a flat pan and put in the fridge for an hour.
Pour off the water and I think you will have a more uniform color.
It looks like there may be some chlorophyll in there.
Is it decarbed already?
I have used cannabutter that was prolly frozen just as long.