Lost second Bluefield2?

Hi all,
We have two Bluefield2 cards in one server. I tried to change the IP address of tmfifo_net1to something other than 192.168.100.2.
Now when I run “mst start” the second card does not show in /dev/mst/
Looks like we lost the second card
But it shows on lspci:

lspci | grep -i mellanox
27:00.0 Ethernet controller: Mellanox Technologies MT42822 BlueField-2 integrated ConnectX-6 Dx network controller (rev 01)
27:00.1 Ethernet controller: Mellanox Technologies MT42822 BlueField-2 integrated ConnectX-6 Dx network controller (rev 01)

27:00.2 DMA controller: Mellanox Technologies MT42822 BlueField-2 SoC Management Interface (rev 01)

Any idea on that?