When I use thestrong text following command to add a nic to an instance:
lxc config device add vm-0CPcG2BlQj nic-G4chwWPzj1 nic nictype=ovn network=test-ovn ipv4.address=10.185.249.3 name=nic-G4chwWPzj1
The following error occurred
Error: Failed to start device "nic-G4chwWPzj1": Failed setting up device "nic-G4chwWPzj1": Failed adding NIC device: PCI: slot 0 function 0 not available for virtio-net-pci, in use by virtio-net-pci,id=dev-lxd_nic--PsYAzjUju1