Anthropic sends out, then retracts details of IPO filing, emails show

OK, legitimately: what is the process error that allows the wrong prospectus to go out? How does something like this happen?

“The artificial intelligence company first sent a copy of a filing that showed Anthropic aimed to sell about 867 million shares in a price range of $70 to $80 per share, then followed up with an email saying details about the pricing were inaccurate. Anthropic in the second email said it would update the filing later.”

I wonder if it would be fair to characterize the inaccuracy as a hallucination?