https://www.mangaupdates.com/series.html?id=142863

this manga was created by over 32 authours

there's a mangaka named Fujiwara Cocoa

she died in 2015 but this manga say it got released in 2017

is this error ? or maybe she help draw it in 2014(because she was sick in 2015 and died of ilness)
and it got released in 2017 ?

or maybe the released year on baka update was error ?

Its an anthology so many titles by different artists. Likely she drew it and then it got compiled in this later. Or perhaps she drew most of a story and then they turned it into an anthology later. A lot of Tolkein Books are the same way.