There may have been several copies, each different to reveal individuals traitors in their midst.
POTUS Trump did this at least once.
Hmmmmmmm....
https://mobile.twitter.com/christina_bobb/status/1441416909451268099
“I’m told the audit report that was leaked was an edited version that had only been sent to one person. Supposedly someone with an ethical obligation to keep information private.”
That is an old spymaster’s trick. Produce multiple copies of a document but with identifiable errors that tell which copy was leaked. Could be a double period where a single period shoud be, missing commas, figures altered slightly in a table, misspellings of a word and so on. It looks like the original but differs just enough to have unique tells.