Mikrotik as central DHCP - DHCP relay target

Hi!

I want to use a Mikrotik device as central DHCP server. My segmentation firewall (Fortigate) will act as DHCP relay for multiple VLANs and send the requests to the Mikrotik device.

Now the problem: I am not able to define multiple networks on one interface:

/ip dhcp-server
add address-pool=pool1 interface=Bridge_Full_Switch name=server1 relay=10.49.0.17
/ip dhcp-server network
add address=10.96.94.0/24 dns-server=1.1.1.1 gateway=10.96.94.1
add address=10.97.94.0/24 gateway=10.97.94.1



> /ip dhcp-server add address-pool=pool2 interface=Bridge_Full_Switch name=server2 relay=10.49.0.17
failure: server or relay with such interface already exists

Can you give me a hint on how a central DHCP can work, if multiple VLANs/networks are behind the same IP?

Thank you and best wishes
Stril

Here is: https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.uobabylon.edu.iq/eprints/publication_4_6800_1412.pdf&ved=2ahUKEwii8LvM1fuCAxVtIRAIHUSEA1EQFnoECCwQAQ&usg=AOvVaw3hmhj62ArG9o66mQu4WAQb