Deleting the datastore where a content library is hosted is probably not the best idea but … yes stupid error and now what. If you are not faint of heart (and now how to take a snapshot), you can rectify this. You should contact GSS as there is not documented solution and this might break.
Take a snapshot and verify if the vCenter backups are in a healthy status. Yes? Ok go ahead.
Log on to the vCenter and create a new Content Library and name it ‘i-made-an-error’. Use the new datastore you want to use and keep the rest of the settings default as these don’t really matter.
Open an SSH session to the vCenter and connect to the Postgress DB ‘VCDB’