Yes.
As explained in “Why did Harry's father emerge before his mother in HP and the Goblet of Fire?”, early editions of Harry Potter and the Goblet of Fire have a mistake in chapter 34 where the echoes of Harry's mother and father appear in the wrong order. The mistake has been fixed in later editions, and Rowling acknowledged that this was an error that she made together with her editor.
She also probablymay have admitted that she made a mistake about Dudley's Playstation.