Ugh. I think it's totally unfair that I cannot replaced enemy faction bridge officer after I did all that diplomatic work. Long and tedious but the reward's moot cuz there wasnt no warning that I will not be able to replace without have to fork a lot of money at the exchange or redo diplomacy missions all over again. At least, I should be able to replace at the vendor, not other way which is obviously a time consuming and waste. I will buy one off the exchange IF I want to have second enemy faction boff. Not just to replace mine.