can't add port to bridge

Hi!
I have RB2011AHx2 with firmware 5.14 that included 2 master ports and 6 slave for 3 per each master:
dmz_iface (ether3, ether4, ether5)
lan_iface (ether8, ether9, ether10)

Last week I had upgrade firmware to 6.49.2. As firmware after 6.41 doesn’t support master ports they were automatically replaced for two bridge:
bridge1 (ether3, ether4, ether5)
bridge2 (ether8, ether9, ether10)

Relevant config:

/interface bridge
add admin-mac=00:0C:42:9B:0E:D7 auto-mac=no comment=\
    "created from master port" name=bridge1 protocol-mode=none
add admin-mac=00:0C:42:9B:0E:DC auto-mac=no comment=\
    "created from master port" name=bridge2 protocol-mode=none

/interface ethernet
set [ find default-name=ether2 ] name=dmz_iface
set [ find default-name=ether1 ] name=inet_iface1 speed=100Mbps
set [ find default-name=ether6 ] name=inet_iface2 speed=100Mbps
set [ find default-name=ether7 ] name=lan_iface

/interface list
add exclude=dynamic name=discover

/interface bridge port
add bridge=bridge1 interface=ether3
add bridge=bridge1 interface=ether4
add bridge=bridge1 interface=ether5
add bridge=bridge2 interface=ether8
add bridge=bridge2 interface=ether9
add bridge=bridge2 interface=ether10

/interface list member
add interface=ether12 list=discover
add interface=ether13 list=discover
add interface=inet_iface1 list=discover
add interface=bridge1 list=discover
add interface=ether3 list=discover
add interface=ether4 list=discover
add interface=ether5 list=discover
add interface=inet_iface2 list=discover
add interface=bridge2 list=discover
add interface=ether8 list=discover
add interface=ether9 list=discover
add interface=ether10 list=discover
add interface=ether11 list=discover

/ip address
add address=192.168.0.1/24 comment="DMZ Network" interface=bridge1 network=192.168.0.0
add address=192.168.1.7/24 comment="LAN Network" interface=bridge2 network=192.168.1.0

Network diagram
[img][https://drive.google.com/file/d/1tUfcPqDf4cJrs5Pa9rYJEwMs_Zoohz_0/view?usp=sharing[img](https://drive.google.com/file/d/1tUfcPqDf4cJrs5Pa9rYJEwMs_Zoohz_0/view?usp=sharing[img)]

I was trying to add old master port to bridge, but I can’t
[admin@MikroTik] /interface bridge port> add bridge=bridge1 hw=yes interface=dmz_iface
failure: dmz_iface is not allowed to be put in bridge

On other hand I can add ether12 to bridge.
Please, help me

https://forum.mikrotik.com/viewtopic.php?t=182601