What do we do when we have one hashtag and two meanings for it?

Like, there is #Amethyst, for the Nostr client, and #Amethyst for crystallography research.

If the same hashtag is used by both groups in separate relays and users start merging those relays by rebroadcasting stuff, do both hashtags just cease to become interesting?

Do their communities disappear out of "I am not here for this" feelings of disappointment? Is this a Nostr battle for which community wins over the other by the sheer amount of posts? Do clients have a role in this? Do relays?

How do we solve it? Do we even need to solve it?