Source: ga Version: 5.3+dfsg-1 Severity: grave src:ga and src:galib seem to be completely unrelated packages, that just happen to both use the acronym "ga".
libga-dev in Debian is built from of src:galib since 2008, but due to its higher version number src:ga has hijacked this package (likely not intentionally). The name of the package built from src:ga must change, that's what this bug is about. I will file a separate bug against src:galib for the epoch that is required there to regain ownership of libga-dev.