Package: repmgr Version: 4.2.0-2 Severity: serious postgresql-12 recently took over a bunch of library packages from postgresql-11. This seems to have caused repmgr's autopkgtest to fail with a bunch of undefined symbol errors.
This can be seen with both testings version (tested as part of the testing migration checks for postgresql 12) and unstable's version (tested as part of regular tests in unstable) of repmgr. https://ci.debian.net/data/autopkgtest/testing/amd64/r/repmgr/3142337/log.gz https://ci.debian.net/data/autopkgtest/unstable/amd64/r/repmgr/3156494/log.gz P.S. You also need to make a source-only upload so your package can migrate to testing.