I have a buttonless device using a DFU bootloader and ble_dfu buttonless DFU service with SDK v13.0.0. I'd like to make the ble_dfu service available for 5 minutes on power up and then disable it so it isn't advertised anymore. Is there a way to remove the service while running, or would it be easier to set a flag in GPREGRET and reset after 5 minutes?