edit bridge/bond policy to remove port attribute, NNCP failed

OCP Version: 4.14.0-0.nightly-2023-08-11-055332 
knmstate operator version: kubernetes-nmstate-operator.4.14.0-202308090413

100%

1. install knmstate operator
2. login web console as administrator, Networking -> NodeNetworkConfigurationPolicy, click create, select from form, create  nncp to create bridge/bond interface, set interface name, state, type, port, click create
3. edit the nncp, clear the inputting of port, click save 

nncp failed after edit with below error:
NmstateError: InvalidArgument: Controller interface br001 is holding unknown port

nncp Available after edit

the port attribute is not removed:

spec:
  desiredState:
    interfaces:
      - bridge:
          port:         <---
            - name: ''
        name: br001
        state: up
        type: linux-bridge