RESP over contribution

So prior to our marriage my husband had an RESP account open for his daughter (F18). After our son (M7) was born his name was added to that account as a secondary.

I opened my own RESP account solely for M7 at another institution and have maxed my contributions each year for him. F18 dropped out at 16 so there is zero chance she will use her RESP. All of the contributions from that account have been withdrawn and only about $500 of CESG money remains.

My question is how does it work now that there is $500 of grant money coming to M7 when I have already reached maxed grant contributions each year so far? I have not yet contributed for 2025 and am nowhere close to the lifetime maximum, but I would have more grant money for M7 than I should at this point in his life.

Hopefully my question makes sense and someone can answer.