火炬之光2That product key is not valid or has already been registered解決辦法

有玩家在玩火炬之光2的時候輸入key卻說That product key is not valid or has already been registered，這怎么辦呢，其實這是你沒有操作好導(dǎo)致的，下面跑跑車就告訴你怎么解決這個問題。