The ZERO-A label was supended at the end of March this year.
https://ja.wikipedia.org/wiki/ZERO-A
>2019年3月3日、同年3月31日付でレーベルとしての活動を休止することを発表した[8]。
I split ZERO-A (the label) from ZERO-A Corp. so that an end date could be added. (The company continues to exist as far as I'm aware.)