Unhandled rejection TypeError: Cannot read property 'room_id' of undefined

[Unkn0wn-MDCLXIV]

I have 5 Max Thermostats and a Max Cube installed.
4 of the thermostats came with the cube. They are working flawless with maxcube-cli.
I ordered a 5th one, which seems to be an older device with an older firmware.
I can get the devices' status, but I am not able to set its mode or temp.
I can set temp and modes via the official max software and via eq3-max perl
Everything is up to date.

Full error output:
Unhandled rejection TypeError: Cannot read property 'room_id' of undefined at MaxCube.setTemperature (/home/pimatic/node_modules/maxcube/maxcube.js:161:110) at CommandInstance.<anonymous> (/home/pimatic/maxcube-cli.js:103:13) at Session.session.execCommandSet (/home/pimatic/node_modules/vorpal/dist/session.js:470:20) at Vorpal.vorpal._exec (/home/pimatic/node_modules/vorpal/dist/vorpal.js:960:18) at Vorpal.vorpal._execQueueItem (/home/pimatic/node_modules/vorpal/dist/vorpal.js:751:17) at Vorpal.vorpal._queueHandler (/home/pimatic/node_modules/vorpal/dist/vorpal.js:735:10) at Vorpal.vorpal.exec (/home/pimatic/node_modules/vorpal/dist/vorpal.js:682:10) at Vorpal.parse (/home/pimatic/node_modules/vorpal/dist/vorpal.js:166:12) at MaxCube.<anonymous> (/home/pimatic/maxcube-cli.js:6:10) at emitNone (events.js:86:13) at MaxCube.emit (events.js:188:7) at /home/pimatic/node_modules/maxcube/maxcube.js:33:14 at tryCatcher (/home/pimatic/node_modules/bluebird/js/release/util.js:16:23) at Promise._settlePromiseFromHandler (/home/pimatic/node_modules/bluebird/js/release/promise.js:512:31) at Promise._settlePromise (/home/pimatic/node_modules/bluebird/js/release/promise.js:569:18) at Promise._settlePromise0 (/home/pimatic/node_modules/bluebird/js/release/promise.js:614:10)

[ivesdebruycker]

This error normally happens when you're using an unknown rf address, but if you're able tot retrieve the status of this device, that can't be the problem.
Could you test if flushing the device cache ('flush' in cli) solves the problem?

[Unkn0wn-MDCLXIV]

I did, and it does not seem to solve the problem.