Wonder Woman, Vol. 1 #271 (1980)

Renewal On Paradise Island
After Princess Diana rescues the new Steve Trevor and heals him with her Purple Healing Ray, Queen Hippolyte asks Aphrodite where he came from. She responds that he is from the Earth of another dimension, and even she has no power to send him back there. Since it is as though Diana was meeting Steve Trevor for the first time, and since Diana must return to Man's World, Aphrodite extends the Mists of Nepenthe over the Earth, causing all people to forget the existence of the other Steve Trevor who died years ago. Once again, Diana competes against the Amazons for the right to go into Man's World, and wins the costume and title of Wonder Woman. Just before Wonder Woman returns with Steve to America, Hippolyte begs him, “Don't hurt her again,” which mystifies Trevor.
Release Date: 1980