Only allow channel index 0 to be PRIMARY

src/components/PageComponents/Channel.tsx

@@ -111,10 +111,11 @@ export const Channel = ({ channel }: SettingsPanelProps): JSX.Element => {
               type: "select",
               name: "role",
               label: "Role",
+              disabled: channel.index == 0,
               description:
                 "Device telemetry is sent over PRIMARY. Only one PRIMARY allowed",
               properties: {
-                enumValue: Protobuf.Channel.Channel_Role,
+                enumValue: channel.index === 0 ? {"PRIMARY":1} : {"DISABLED":0, "SECONDARY":2},
               },
             },
             {