During degeneration processing in which a first electronic device is degenerated based on an abnormality which has occurred in the first electronic device among the plurality of electronic devices after a new firmware used for switching of firmware of the electronic devices is stored in the first memories of the electronic devices, a storage control device confirms whether switching to new firmware has been completed in a second electronic device among the plurality of electronic devices, where the second electronic device is on a connection route coupling the first electronic device which is a firmware switching target and the storage control device. The storage device inhibits incorporation of the second electronic device as a usable device in a case where switching to the new firmware has not been completed in the second electronic device.