Newb to lasers - Mast step repair confirmation

Hi all, we just got a laser gifted to us for the kids from someone at our club "retiring" from Dingy racing. it's an Older boat, but he was a pretty serious racer back in the day. Fitted with updated rigging, the old wooden CB and rudder look brand new!

Now for the problems, I noticed when loading it up for the offseason that it has a crack in the underside of the hull below the mast step. Handful of sails and no water appeared to accumulate in the hull, but when Fill the mast step with...

Newb to lasers - Mast step repair confirmation