You may be in the same case I was. My default version of libc6-udeb was not 2.31-0ubuntu9 but just 2.31. If this is the case the sed line you used won't work. That's why I modified it to:
sed -i -e '/Package:
libc6-udeb/{N;N;s/Version: 2.3.*/Version: 2.31-0ubuntu9.3/}'
/var/lib/dpkg/status
Hi Volodymyr.
You may be in the same case I was. My default version of libc6-udeb was not 2.31-0ubuntu9 but just 2.31. If this is the case the sed line you used won't work. That's why I modified it to:
sed -i -e '/Package: {N;N;s/ Version: 2.3.*/Version: 2.31-0ubuntu9.3/}' dpkg/status
libc6-udeb/
/var/lib/
which should work in both cases.