Problem flashing bootloader spark V2

Just now I am trying to add my second spark to brewblox. I already have a Spark v3 connected and now I am trying to add a Spark V2. While flasing the brewblox-ctl flash went ok but the brewblox-ctl bootloader gives an error. Is this a know issue? I cannot find anything about this in the forum.

pi@raspberrypi:~/brewblox $ brewblox-ctl bootloader
Please press ENTER when your Spark is connected over USB
The following shell commands will be used:

docker-compose down
docker pull brewblox/firmware-flasher:rpi-edge
docker run -it --rm --privileged brewblox/firmware-flasher:rpi-edge flash-bootloader

Press ENTER to continue, Ctrl+C to cancel

Running command:
docker-compose down

Removing network brewblox_default
WARNING: Network brewblox_default not found.

Running command:
docker pull brewblox/firmware-flasher:rpi-edge

rpi-edge: Pulling from brewblox/firmware-flasher
Digest: sha256:d21ad9db2451e2c5492f24e7dadf79696447036bcf7e231dd72b8404f0f4edcb
Status: Image is up to date for brewblox/firmware-flasher:rpi-edge

Running command:
docker run -it --rm --privileged brewblox/firmware-flasher:rpi-edge flash-bootloader

Flashing the bootloader is disabled while we fix a bug.
pi@raspberrypi:~/brewblox $

The bootloader flash bricked multiple Sparks, so we disabled it until we find and fix the problem.

If you enable Wifi on your Spark, it will automatically update the bootloader anyway - and that doesn’t seem to cause problems.

Perhaps add that info about he bootloader being downloaded automatically once WiFi has been setup if needed to the console print.