mysterious hidden ssid with capsman

Hi,
i’m at the very beginning with mikrotik hard- and software, stumbled upon a situation i can’t explain and kindly ask you to have a look and help me to understand.
As a first step i integrated a CRS318-16P in my existing network, have CapsMan running on it wich is provisioning 3 Accesspoints (2 CAP ac, 1 wsAP AC lite), providing 3 SSID. Everything is up and running, coverage and speed ist supreme and handover between the AP better than ever.

But besides my 3 SSID i see 1 on the 5GHz Band on each AP which i can’t explain. Why is this SSID up? Is this a Problem or a Feature?
my configuration:

# sep/02/2021 20:39:12 by RouterOS 6.47.10
# software id = RLEG-R3D1
#
# model = CRS318-16P-2S+
# serial number =xxxxxxxxxxxx
/caps-man channel
add band=2ghz-b/g/n control-channel-width=20mhz extension-channel=disabled \
    frequency=2412 name=channel1
add band=2ghz-b/g/n control-channel-width=20mhz extension-channel=disabled \
    frequency=2437 name=channel6
add band=2ghz-b/g/n control-channel-width=20mhz extension-channel=disabled \
    frequency=2462 name=channel11
/caps-man configuration
add channel.band=2ghz-g/n channel.control-channel-width=20mhz \
    channel.extension-channel=disabled channel.frequency=2412,2437,2462 \
    channel.reselect-interval=1h channel.tx-power=0 country=germany \
    datapath.local-forwarding=no installation=indoor name=\
    "Capsman 2.4Ghz Channel" rates.basic=12Mbps rates.supported=\
    12Mbps,18Mbps,24Mbps,36Mbps,48Mbps,54Mbps security.disable-pmkid=yes
add channel.band=5ghz-n/ac channel.control-channel-width=20mhz \
    channel.extension-channel=XX channel.frequency=\
    5180,5200,5220,5240,5745,5765,5785,5805,5825 country=germany \
    datapath.local-forwarding=no installation=indoor name=\
    "Capsman 5Ghz Channel" rates.basic=12Mbps rates.ht-basic-mcs="" \
    rates.ht-supported-mcs="" rates.supported=\
    12Mbps,18Mbps,24Mbps,36Mbps,48Mbps,54Mbps security.disable-pmkid=yes
/interface bridge
add name=bridge1
/interface ethernet
set [ find default-name=ether14 ] auto-negotiation=no poe-out=off \
    rx-flow-control=auto tx-flow-control=auto
/caps-man configuration
add datapath.bridge=bridge1 datapath.local-forwarding=yes name=K2 \
    security.authentication-types=wpa2-psk security.encryption="" ssid=K2
add channel.tx-power=7 datapath.bridge=bridge1 datapath.local-forwarding=yes \
    name=K2tech security.authentication-types=wpa2-psk ssid=K2tech
add datapath.bridge=bridge1 datapath.local-forwarding=yes name=LU12 \
    security.authentication-types=wpa2-psk ssid=LU12
/interface list
add name=WAN
add name=LAN
/interface wireless security-profiles
set [ find default=yes ] supplicant-identity=MikroTik
/ip hotspot profile
set [ find default=yes ] html-directory=flash/hotspot
/caps-man access-list
add action=accept allow-signal-out-of-range=10s disabled=no interface=all \
    signal-range=-84..120 ssid-regexp=""
add action=reject allow-signal-out-of-range=10s disabled=no interface=all \
    signal-range=-120..-85 ssid-regexp=""
/caps-man manager
set enabled=yes
/caps-man manager interface
set [ find default=yes ] forbid=yes
add disabled=no interface=bridge1
/caps-man provisioning
add action=create-dynamic-enabled hw-supported-modes=g,gn \
    master-configuration="Capsman 2.4Ghz Channel" name-format=prefix-identity \
    name-prefix=2.4GHz slave-configurations=K2,K2tech,LU12
add action=create-dynamic-enabled hw-supported-modes=ac,an \
    master-configuration="Capsman 5Ghz Channel" name-format=prefix-identity \
    name-prefix=5GHz slave-configurations=K2,K2tech,LU12
/interface bridge filter
add action=drop chain=input dst-port=68 in-interface=ether1 ip-protocol=udp \
    mac-protocol=ip
/interface bridge port
add bridge=bridge1 interface=sfp-sfpplus1
add bridge=bridge1 interface=ether1
add bridge=bridge1 interface=ether2
add bridge=bridge1 interface=ether3
add bridge=bridge1 interface=ether4
add bridge=bridge1 interface=ether5
add bridge=bridge1 interface=ether6
add bridge=bridge1 interface=ether7
add bridge=bridge1 interface=ether8
add bridge=bridge1 interface=ether9
add bridge=bridge1 interface=ether10
add bridge=bridge1 interface=ether11
add bridge=bridge1 interface=ether12
add bridge=bridge1 interface=ether13
add bridge=bridge1 interface=ether14
add bridge=bridge1 interface=ether15
add bridge=bridge1 interface=ether16
add bridge=bridge1 interface=sfp-sfpplus2
/ip neighbor discovery-settings
set discover-interface-list=all
/interface detect-internet
set detect-interface-list=all
/interface list member
add interface=ether2 list=LAN
add interface=ether3 list=LAN
add interface=ether4 list=LAN
add interface=ether5 list=LAN
add interface=ether6 list=LAN
add interface=ether7 list=LAN
add interface=ether8 list=LAN
add interface=ether9 list=LAN
add interface=ether10 list=LAN
add interface=ether11 list=LAN
add interface=ether12 list=LAN
add interface=ether13 list=LAN
add interface=ether14 list=LAN
add interface=ether15 list=LAN
add interface=ether16 list=LAN
add interface=sfp-sfpplus2 list=LAN
add interface=ether1 list=WAN
add interface=sfp-sfpplus1 list=LAN
/ip dhcp-client
add disabled=no interface=bridge1
/ip dns
set servers=192.168.42.21
/ip firewall nat
add action=masquerade chain=srcnat ipsec-policy=out,none out-interface=\
    bridge1
/system clock
set time-zone-name=Europe/Berlin
/system identity
set name=MikroTikSwitch
/system package update
set channel=long-term
/system routerboard settings
set boot-os=router-os

Any hints?

follow up:

i found a reproducible way to get rid of that .
In CAPSman i have 2 configurations for setting the 2.4/5GHz Channels. Read that in an tutorial.
I set these as master-configurations, and the actual ssid as slave configurations.

As soon as i create a brandnew configuration with the ssid-configurations only the disappers.

So i have to alter my question:
Is there a better way do define 2.4/5GHz Channels with multiple SSID?

Master interface has to be up&running because it’s the only configuration which has radio parameters (frequency, channel width, extended channels layout, other advanced parameters) defined. Usually one assigns one of SSIDs to master interface …

thanks @mkx
now i understand, i mis-interpreted the concept.
steep learning curve… :wink: