Hey
@AS24 I'm well thank you, hope you are too!
Why is it that you can't write the same things again, if you passed the application two times before? Have they specifically advised against this? I understand if you're told to change the wording, but as for examples or experiences, I would imagine that these would relatively stay the same - and that you would just word it differently. In which case, I would advise that you choose your strongest achievement - one that has allowed you to go into detail about what you've learned, overcome, exceeded at etc.
If however, you feel like its better to change it completely, then your example of succeeding in your paralegal job isn't necessarily counterproductive, so long as you can explain why that makes you proud? You mentioned you don't have much experience in this sector, so focus on the challenges, how you overcame them, what you did and what you've learned about yourself, and lastly why this makes you proud.
If you can't qualify it that much, then I would suggest sticking to an achievement that actually makes you proud - even if you've mentioned it before. Such achievements don't tend change year-on-year, so I wouldn't imagine anyone penalising you for that.