It was announced that CUL (VocaRevo) mascot will become a Vocaloid product later this year, she is currently a representation of VY1's voice (unofficially). So should we start removing VY1 tag from CUL pics?
CUL and VY1 have always been separate characters, even though they shared the same voice. It's very similar to Yowane Haku and Hatsune Miku's situation: They used to share the same voice, but now Haku has been given a distinct voice. Yet, we haven't tagged every Yowane Haku picture posted before the first instance of Haku's new voice with hatsune_miku.