[ovirt-users] How to disable the QoS settings (go back to 'Unlimited' state) in the vNIC profile by using oVirt REST API?

Hi, I have a vNIC profile with a QoS object: <vnic_profile> <name>vnic_test</name> <network id="00000000-0000-0000-0000-000000000009"/> <qos id="74de92de-3cea-449c-b82e-4655802698c5"/> <pass_through> <mode>disabled</mode> </pass_through> <port_mirroring>false</port_mirroring> </vnic_profile> Now I try to update this object using PUT method and set the 'pass_through' mode to 'enabled', But I always got the error message "Cannot edit VM network interface profile. 'Port Mirroring' and 'Qos' are not supported on passthrough profiles." no matter I send the request body like: <vnic_profile> <name>vnic_test</name> <network id="00000000-0000-0000-0000-000000000009"/> <pass_through> <mode>enabled</mode> </pass_through> <port_mirroring>false</port_mirroring> </vnic_profile> OR <vnic_profile> <name>vnic_test</name> <network id="00000000-0000-0000-0000-000000000009"/> <pass_through> <mode>enabled</mode> </pass_through> </vnic_profile> Could anyone tell me how to disable the related QoS settings (namely go back to 'Unlimited' state) in a vNIC profile by using REST API?