OneNote for iOS cannot delete notebooks, notebooks list is corrupted

(Please note that this is Russian Q&A Forum, any threads should be posted in Russian. However, I will still provide an answer in English based on your initial response.)  

Hi, Андрей Макаренко

This looks like a stale notebook reference linked to the Microsoft account, not damage to the notebook itself. The January 1, 1970 date and the fact that the valid notebook opens from OneDrive suggest that OneNote is loading outdated entries from its cached or online Recent list.

Here are some suggestions you can try:

Confirm that the working notebook is fully synchronized, since the next step removes local offline copies.

On the iPhone, open Settings > Apps > OneNote > Reset OneNote. Enable Delete All Notebooks and Delete Login Credentials, then force-close OneNote, reopen it, and sign in again. This reset does not delete notebooks stored in OneDrive, but any unsynchronized local changes can be lost.

If available, open OneNote on a Windows or Mac computer and use Close This Notebook for every deleted notebook. Deleting a notebook from OneDrive does not always remove its entry from OneNote’s notebook list.

If the entries return or the browser permission error remains, forum moderators cannot inspect or repair account metadata. Contact Microsoft Support, select Microsoft 365 and Office > Technical support, and provide the screenshots, affected notebook names, OneNote version, and Microsoft account email so the issue can be checked at the account level.

Please be advised that this is a user-to-user support forum. Moderators and contributors, including external Microsoft employees, are not allowed to directly interfere with Microsoft product features or access back-end systems. Our role is limited solely to providing technical guidance on reported incidents, requests, or ideas.   

Thank you for your patience in reading, I hope this information has been helpful to you. 

If the answer is helpful, please click "Yes" and kindly upvote it. If you have extra questions about this answer, please click "Comment."    

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.