Stringer Dings

My boards keep getting cracked right along the stringer. Usually on both sides and then it pushes down about a 1/4 inch deep. What is the easiest/best way to fix this situation?

im guessing youre talking about on the deckā€¦if this is the case then grind down that part of the stringer and then put a patch on it, hotcoat it then sand. youre ready to get back in the water. good luck!!!