Comma Separated Artists List?

I’m using the beets database I made to write metadata for my songs. However, there’s a problem in that it writes artists like “Kendrick Lamar Feat. U2” When I need it to do “Kendrick Lamar, U2”. Does anyone know how to change this? Alternatively, is there another field that will give me an easily programmatically interpretable list of artists? My program is categorizing Kendrick Lamar separately from Kendrick Lamar Feat. U2 which is messing a number of things up.