You could use Array.reduce to copy the array with the new devices disabled:
const devices = [ /* ... */ ];
const newDevices = devices.reduce((ds, d) => {
let newD = d;
if (d.deviceID === 'eI2K-6iUvVw:APA') {
newD = Object.assign({}, d, { enabled: false });
}
return ds.concat(newD);
}, []);