GOG Galaxy achievement bug? (The Witcher 3: Wild Hunt)

gerasader
You have not fulfilled the contract for the spirit of the forest, there are 2 options for passing this contract, one is exile, the second is murder, you must kill him to get an achievement.

gerasader
Achievement from you should be obtained only by killing. But since you did not kill him, but still fulfilled the contract, the other achievement was counted. If killed, there would be 2 achievements.

GG4
Bupycop
Hmm, the logic of the game is of course slightly lame))