The SyncBox/PTP and SyncBox/PTPv2 firmware was shipped with preconfigured SSH keys. For this reason, a tool has been developed to automatically regenerate SSH keys and remove old and authorized keys. Importing the tool using the update functionality regenerates all SSH host keys. Thus, the next time an SSH login attempt is made to a SyncBox, a warning message that the host key has changed appears.
Source: Meinberg News EN Meinberg Security Advisory: [MBGSA-1904] SyncBox PTP/PTPv2