How to response to product compliance notification?

Hi,

I just received the product compliance notification in Seller Central. I guess it’s a new feature because I’ve been selling this product for about 2 years and just got this notification. After googling CPSC (Consumer Product Safety Commission) about magnet hazard. It would be considered a hazmat if (1) the magnet is small enough that kids can swallow or (2) the magnet is very strong (flux index over 50kg2mm2. My product doesn’t fit any of the two criteria. It’s bigger than a human head. It’s impossible to swallow. The magnet force is also nowhere near that strong.

The question is how to response to Amazon properly? This is the first time I’ve got this kind of request. Please advise. Thank you.