Prismic saying page exists via unique ID but there's no such page

I've currently made 2 types of templates on prismic: let's say layout A and layout B, I'm trying to create a page with layout B but it says the UID that i entered already exists for layout B but there's no such page! Checked archived, planned, nothing - need help ASAP. Thanks!

The UID is unique throughout your project and is stored historically - see this:

Have you used it anywhere else?


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