Duplicate Page Sizes
If I go to add a new page, for some reason all my page sizes are duplicated.
The secondary one don't do anything and can't be clicked on, the first one works correctly as it should.
InDesign 13.1 MacOS 10.13.5
Done all the usual restarts, check for updates etc.
Any ideas?

We have released an update for InDesign CC2019 (v 14.0.1) which contains fixes for some key issues. If you are not already on 14.0.1 (build 209), then we recommend you to update to latest version.
If you still face this issue even after updating, please send the following information to santalwa@adobe.com :
Reproducible Steps –
• Is the issue related to a specific document(s)/asset(s)? If yes, can you please share the document(s)/asset(s) with us? Please package the entire document(To package the document, Go to File → Package)
• Does trashing InDesign Preferences and Cache help resolve the issue? Please take a backup of the same before trashing them.
Adobe InDesign team
-
We have released an update for InDesign CC2019 (v 14.0.1) which contains fixes for some key issues. If you are not already on 14.0.1 (build 209), then we recommend you to update to latest version.
If you still face this issue even after updating, please send the following information to santalwa@adobe.com :
Reproducible Steps –
• Is the issue related to a specific document(s)/asset(s)? If yes, can you please share the document(s)/asset(s) with us? Please package the entire document(To package the document, Go to File -> Package)
• Does trashing InDesign Preferences and Cache help resolve the issue? Please take a backup of the same before trashing them.Adobe InDesign team