Is that it hanging out of the top case lock?
I know some owners of bikes with saddlebags that need a key to open who took spare keys and added a knob on the end to make them look like dials covering the key holes and just left them there all the time.
I've always kept a spare key hidden on my bikes someplace, though not where they can be seen. On my AK, since there is no "key" involved being keyless, I put my spare fob in a RFID pouch (bought a pair on Amazon) and drop that in the storage box under the seat. I have a secret seat latch release that I can use to open the seat to get at it. The RFID pouch prevents the AK from "seeing" that fob from the storage box.