If your property underwent some physical changes and you need to reflect them in the system and change the configuration of Spaces and Space categories then this article may be of help.
Resources: Create, modify or delete a Space
Note: As stated in your contract, if you add or remove Spaces, your Mews invoice will be recalculated as it is based on the number of Spaces in your property.
At the moment, you cannot delete or add a Space Category if it has Spaces attached.
You need to unmap and delete all Spaces from the Space Category
If you wish to keep past reporting
You cannot add or amend Spaces and Space category if you wish to keep your past reporting as it is.
You will need to create a new category and spaces to create new reporting.