There is only two ways to solve this:
<br>A. Buy a new cat, which is for sure the best thing to do because with option B the boat gets heavier and the sails not younger!
<br>B. Drill about 5mm holes in diameter intothe deck until u reached the softer sandwich level. This must be done about every 5cm from hole to hole. Then inject epoxy in the sandwich level, let it harden and then cover the holes with topcoat.
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<br>Good luck
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<br>PS: This happened to quite some older boats maybe due to suboptimum use of Epoxy in the production process in Europe. I have seen some boats that were fixed in this way, but race sailing was then history for them.<br><br>