Hi, Thanks for caring about fixing #1066136 in stable.
Your upload has an unconventional version number, and I'm not sure that all tooling will correctly handle a version suffix of "+deb12u0.1". The concept of NMUs isn't really used in the same way for (old)stable uploads as it is in unstable / experimental. Could you please re-upload using the more usual version style of 2.1.1-1+deb12u1? As a side note, please also consider filing p-u bugs against release.debian.org to track such uploads. As noted in DevRef, for uncontroversial uploads you can upload at the same time as filing the bug, without waiting for an ACK. Thanks, Adam