Answer:
first impression is never the last one 'coz people change, times change and trends change e.g. you are a new worker you make a lot of mistakes and over time you become an epert and even your collegues began to accept you as one even though they might remember you blunders.
The correct expression is " A first impression is a lastING impression ." If it's a really bad first impression , it may be the last chance with that person, or you may have to work hard to overcome a bad first impression.