On Jira Cloud, the menu uses two different Korean words interchangeably for "Fix Version" in different places - "수정 버전" and "해결 버전".

They should all be changed to "수정 버전".

Side note:
Semantically they're not wrong since "fix" can be translated into the two Korean words you've used: either "수정" or "해결" (the latter could also mean 'resolved').

But since Fix Version is a set field, members of my team  have reported that they find this very confusing. I hope this gets changed.