Double affiliation for...

Double affiliation for global fellows Dear All, I will soon be submitting a study I performed at my outgoing host institution (US). I have included both my institutions (US and European) as affiliations in the manuscript. My US supervisor however wants me to take out the European affiliation, which I don't think is fair (they are paying me after all). Hence I'd like to keep this double affiliation. Is there a statement somewhere favoring such double affiliations for global fellows? I haven't found anything in the grant agreement. Thank you, Best, Jessica