Page numbers in document change to letters and not numbers after the 90th page

[Lee304723240ek3]

I have a 122 page document, and the pages past the 90th page are showing as letters, for example:

DG DH DI DK DL DM 

And I have trierd everything I know to get rid of them and for the numbers to show. 

Can someone help me please? 

Thanks

Lee

[Lee304723240ek3]

 

[Robert at ID-Tasker]

Page 96 - there is triangle above - it indicates start of a new Section. 

https://helpx.adobe.com/uk/indesign/using/numbering-pages-chapters-sections.html

[Peter Spier]

In line with waht Rober has said, select Page 96 in the panel, then open the pael flyout menu (or right-click on pg 96) and choose Numbering and Section Options...

If there is not a reason to start a section, uncheck the box to Start New Section. If there is a need for a section start, check the numbering options.

If all of that is correct, then I would export the file to .idml and open that and save as a new .indd (don't overwrite the old file) and see if it clears up the problem.