Version in base suite: 1.2.0-6
Version in overlay suite: 1.2.0-6+deb12u1

Base version: libtommath_1.2.0-6
Target version: libtommath_1.2.0-6+deb12u1
Base files: libtommath-doc_1.2.0-6_all.deb
Target files: libtommath-doc_1.2.0-6+deb12u1_all.deb

+W: debian-news-entry-has-unknown-version 1.0-1