Unidentified brown slime mold

[Cyrill Fromm]

Hello, i keep this slime mold now for over 2 years now and i still have no idea what species it is, it doesn`t sporulate although it is not even kept in the dark and starvation doesn't help either. If i overfeed it, it also starts to secret a strange black jelly like substance.

I mostly call it "my brown slime mold" but its color fluctuates between dark brown and white.