Why France accepted naval parity with Italy

Why did France accept parity with Italy at Washington?

Italy refused to sign for less than France received, while France was economically weak and unwilling to remain outside the treaty.

Italy's negotiating position was simple: match every French allowance. France could reject parity only by risking the collapse of its own participation in a settlement it needed. Economic weakness reduced Paris's freedom to sustain an unconstrained naval race. The resulting parity tied French force planning to the Mediterranean and made it harder to cover wider imperial commitments.