What will happen if I cannot get Amazon to remove product inauthentic complaint?

A customer recently complained that one of my items is inauthentic. Despite submitting invoices from my supplier, Amazon refused to remove the complaint, stating that they were not able to contact the supplier and verify they are legitimate.

This product’s sales are quite slow and I do not mind never selling this item again if it means saving the time/hassle of fighting Amazon over this, but I am concerned about the impact the complaint will have on my account health (which currently shows as healthy [236] since this is the first time in 7 years I have ever had any issues). Will my account be at risk if I ignore this complaint? Or will it only be an issue if several complaints get lodged?