Version in base suite: 1:78.14.0-1~deb11u1
Version in overlay suite: 1:91.8.0-1~deb11u1

Base version: thunderbird_1:91.8.0-1~deb11u1
Target version: thunderbird_1:91.10.0-1~deb11u1
Base files: thunderbird_91.8.0-1~deb11u1.dsc
Target files: thunderbird_91.10.0-1~deb11u1.dsc

-W: newer-standards-version 4.6.0 (current is 4.3.0)
+W: newer-standards-version 4.6.1 (current is 4.3.0)