Those are actually different stars:Lax quality control by FD when creating the Milky Way!
Couple of years ago I reported a duplicate system name but with totally different bodies out in IC1805 Sector; the issue report timed out and was dropped because nobody had supported it....I assume the duplicates are still out there.
Beta Hydrae - Wikipedia
en.wikipedia.org
Beta Hydri - Wikipedia
en.wikipedia.org
Hydrus and Hydra are two very different constellations:
Hydrus - Wikipedia
en.wikipedia.org
Hydra (constellation) - Wikipedia
en.wikipedia.org