When a car is totaled by a flood, insurance companies brand the title as Salvage or Flood. This tells any future buyer that the car is compromised.
Scammers hate those brands because they can’t sell the car for full price. So, they move the car to a state with laxer laws, register it there, and wash that brand off the document. They’re betting that you won’t look close enough to see the damage they’ve tried to hide.