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From what I am hearing the stage-play called The Cursed Child is based on the characters from the Harry Potter series. It is set 19 years from the end of Deathly Hallows (i.e. When Harry's children are starting their time at Hogwarts).
I have also seen the J.K. Rowling has had at least some involvement and been on the set and a part of rehearsals, etc.
My question is has there been a statement given relating to the canon of the stage play to original series? If so, would any conflicting information be considered a retcon?
Related: Are J.K. Rowling interviews Harry Potter canon? What happens to canon if there's a discrepancy with the book? - but not dupe because this asking about in-universe information.