What does icbc with prejudice mean?

ICBC is the Insurance Corporation of British Columbia.

In a settlement situation or civil court, a dismissal with prejudice means you can never make that suit or claim again.

In the context of ICBC, the term "without prejudice" is often a shorthand to notify the reader of an offer that if a settlement cannot be reached, such offers are not to be held against the one making the offer in a court of law.