If you see the message "You are using an older System Program firmware version for KATANA BASS. Please update to the latest firmware version." when connecting the KATANA-210 BASS to BOSS TONE STUDIO for KATANA BASS, this means your KATANA-210 BASS unit's system program needs to be updated to the latest version.
Download and install the latest system program from the KATANA-210 BASS download page: https://www.boss.info/global/support/by_product/katana-210_bass/updates_drivers/