MarsSeed [1] filed a deletion request for jemalloc4 [2]: Unneeded legacy package from 2019. Nothing depends on it. Conflicts with repo's jemalloc. It's best to delete at this point.
[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/jemalloc4/
