If a Space belongs to the Inventory, this information is stored in the ELN Settings, under the section Inventory Spaces.
To move a Space from the Lab Notebook to the Inventory, click on the + button on top of the Inventory Spaces section, select the Space you want to move and Save the Settings.
To move a Space from the Inventory to the Lab Notebook, click on the – button next to the Space you want to remove in the Inventory Spaces section and Save the Settings.
ELN Settings can be edited by Instance admins, group admins in multi-group instances and by anyone with admin rights to the ELN_SETTINGS Space.