A network engineer is automating the configuration of a new VLAN on a Cisco Catalyst 9000 switch using RESTCONF. The engineer sends a PUT request to the URI 'https://switch/restconf/data/Cisco-NX-OS-device:Native/VlanList' with a JSON payload containing the VLAN details. The switch responds with a 405 Method Not Allowed error. What is the most likely cause of this error?

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