On Sat, 18 Dec 2021, Mark Allums wrote:
Preparing to unpack .../libc6_2.33-1_amd64.deb ... Unpacking libc6:amd64 (2.33-1) over (2.34-0experimental1) ...dpkg: error processing archive /var/cache/apt/archives/libc6_2.33-1_amd64.deb (--unpack): trying to overwrite shared '/usr/share/doc/libc6/NEWS.gz', which is different from other instances of package libc6:amd64
I'd delete that file and try again. (move it to the side if it's something you might want to consult)