NextCloudPi warns of 2nd USB device while there was only one

Error: Counted 2 Devices

Setup a fresh install of NextcloudPi (17.0.2) on a debian10 machine and everything went well as expected. However, when trying to format the external SSD for Nextcloud to use as BTRFS, it throws the above error. Tried removing the external SSD and restarted the format USB process. However, this time it clean wiped my internal drive.

NextcloudPi was somehow seeing the internal drive as external. I did not have this problem in the same machine with version 17.0.0 or 16 before that. Please advice