Kinda sounds like creative autonomy

"Listen to Britney Spears & the Backstreet Boys New Song 'Matches'"

https://www.harpersbazaar.com/celebrity/latest/a34942418/britney-spears-backstreet-boys-collab-matches/

"Britney Spears Threatens to Stop Performing After Losing Conservatorship Case" | Consequence of Sound

https://consequenceofsound.net/2020/11/britney-spears-conservatorship-never-perform-again/