I discovered today that if you upgrade a network containing a single MS220-8p that was on MS 15.21.1, that then became MS 15.21.1/CS 15.21.1 with the firmware split, the ghost CS entry gets left at 15.21.1 with no way to upgrade or remove it... 🤔
![Screenshot_20230817_092433_Chrome.jpg Screenshot_20230817_092433_Chrome.jpg](https://community.meraki.com/t5/image/serverpage/image-id/31903iDD256772543964DD/image-size/medium?v=v2&px=400)
As you would expect the only options for the network upgrades are the MS tree.
![Screenshot_20230817_092935_Chrome.jpg Screenshot_20230817_092935_Chrome.jpg](https://community.meraki.com/t5/image/serverpage/image-id/31904i4B5B37586AB9E54C/image-size/medium?v=v2&px=400)