On 12/03/2020 21:29, Anton Gladky wrote: > Thanks Emilio and Salvatore for very valuable comments! > > I think then, that it would be more proper way to upload the lower > upstream version 3.20181128.1 into the Jessie and Stretch to escape > higher versions on older releases. Well you used 3.20181128.1+deb8u1, which is higher than what is in buster. You should use ~ when backporting a version from a newer release. Cheers, Emilio