When updating the workspaces list, you provide it with the latest information about the workspaces it shows.
To update the workspaces list:
Open a building. For more information on how to do so, see section 4.6.1., 5.4.3. or 6.1.1.
Go to the building card (see image below).
Click the tab called "Cleaning" (see image below). Within the tab called "Cleaning" you will find a workspaces list. In the workspaces list you will see the workspaces available in the building you are working with.
Click "Update list" (see the first image below). When you do so, the workspaces list will be updated (see the second image below).