Pdf files

hello there!
i am making a magazine…these days and we are few hours before printing
now i correct the mistakes and i close pdf files again only the pages that had problem…but in some pages i have this warning

one or more of the pages specified are not valid page names

what is the problem? is about page and numbering?

Read through this. It may help.
https://forums.adobe.com/thread/323603

Sorta depends on how you edited the PDF and what may have happened to your page names…

thank you… is the first time that happens…i ve been working this magazine since 2011…

All I can say is, over that time, Adobe has not improved their software, if anything it has devolved. Been doing this 20 years myself and the day something doesn’t go sideways unexpectedly is a day to celebrate.
Good luck.