br-int not able to create port "error: could not open network device int-br-ex (No such device)"

Issue

Bridge br-int
        Controller "tcp:127.0.0.1:6633"
            is_connected: true
        fail_mode: secure
        Port br-int
            Interface br-int
                type: internal
        Port patch-tun
            Interface patch-tun
                type: patch
                options: {peer=patch-int}
        Port int-br-ex
            Interface int-br-ex
                options: {peer=phy-br-ex}
                error: "could not open network device int-br-ex (No such device)"~