Thank you.
The script was using following to determine version, which gave wrong result now
$ cd piaware_builder
$ VER=$(git describe --tags | sed 's/^v//')
$ echo ${VER}
5.0-14-g6c6f0e9
I will change the script to use this one:
cd piaware_builder/package-buster
VER=$(grep "Version:" debian/piaware/DEBIAN/control | sed 's/^Version: //')
echo ${VER}
6.0