When completing an inspection, you may encounter an error "Equipment can only be assigned to one rental at a time".
This means that the rental asset you've selected is in use or another reservation exists before this reservation is supposed to start. Make sure to double-check your rental dates. If you need the equipment now, choose another rental for reserving or contact Customer Support (using the blue chat icon) to help you find an asset to rent.
You can check other rental reservation schedules by clicking Rentals from the main menu in the Link app. Select a rental from the list. From the rental details, select Modify Rental Dates.