It's going to be a tricky fix either way. Possible solutions;

- The Jedi master turns sith.

- Jaskan Voth turns sith. (Through a code-word given by the bounty hunter. They're clearly after the other two anyway)

- Nima trips and breaks her neck (may I suggest falling into a mechanical trap of some sort that kills her in that case?) 

- Bounty Hunter turns into a jesus-ninja, or gets backup. (Don't like that one)