Hah, so doing a search in KTool, I can see one other instance of n_twilekf001.utc. The way the search tool works though doesn't specify the parent module. So I looked through every damn module in the game and where do I find it? STA_M45AD - the final level of the Star Forge. In other words, it's the UTC used for the Easter egg cheat "dancedancemalak".
Given that, you are probably ok to keep it as-is, but this should be a lesson for future modding efforts: don't half-ass it, do it right the first time.