Just spoke w sw rep. He said this affects models dated before 8/19. Said you could either send to sw or find an armorer listed on their website to check your firearm for the warning. This warning has to do with the drop safety function on the firearm.

I purchased a shield yesterday at cabelas and was supposed to pick it up on Saturday. They said they'd refund the money since I hadn't picked it up yet, otherwise you're on your own in terms of dealing w sw.