There are 1 or more Map titles missing in the Topic/See Page table of your Section.
It is a basic rule that each page in a FS Pro document must have a Block line at the end of the page.
If there is no Block line anymore due to the use of the 'Backspace' or 'Delete' key, FS Pro does not recognize that a new Map has started.
Put your cursor in the last Block of your Map, go to the Block drop-down in the FS Pro menu and select 'Block line'.
Result: A Block line will be added at the end of the Map. When you update the Topic/See Page table again, the missing Map title(s) will be presented.