this package seems to have new commits in its VCS but has
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the Debian changelog and uploading this new version into the archive.
Here are the relevant commit logs:
Author: Debian Janitor <email@example.com>
Date: Fri Sep 10 17:36:10 2021 +0000
Apply multi-arch hints.
+ libproperties-cpp-doc: Add Multi-Arch: foreign.