An editorial Goof. The Marvel Bullpen gave comic fans a "No prize" whenever they would solve a problem or a mix up in one of the Marvel Comics, so that it wouldnt seem that the writer/artist had made a mistake. 
In tribute to this long legacy, Marvel Comics published the No-Prize Book in 1983, in witch the biggest mistakes made in Marvel Comics up until then where published.  
Think of,  the X-men Angel calling his friend "Angel" , wrong colors on hero's, goofy sayings (some of them even racist by today's standards) or misspelled names on the same page.

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  10/12/2018