USG Flex 500H HA mode firmware upgrade with MFA

Mk88_it

Hello,

We have two 500H in HA mode and we would upgrade the firmware. We are trying to follow these instrutions from the manual:

Firmware Upgrade on Paired Zyxel Devices

1First, upgrade the firmware to the passive device.

2After upgrade, the passive device becomes the active device and handles all traffic during the firmware upgrade.

3Firmware is then upgraded to the passive primary device.

4After the firmware upgrade is complete on both Zyxel Devices, the primary device becomes the active device again.

We have activated MFA for admin user.

From the LAN of primary device we can reach the secondary passive device using the HA management IP but when the device requests the MFA code, this message is displayed

So, the question is: How we can upgrade the firmware of the passive device?

Thankyou