Brick after update firmware

I have EG105G ( v1 - old version ) , After make mistake update firmware of EG105G-V2 ,  it brick . How can fix now ?



And one important question:
Ruijie is a big company, so why so careless in not adding a software compatibility test feature to each reyee - ruijie device, this is a minimum feature that should be present in almost all other companies they also add, I have done a lot of tests for many APs, including gateways, routers... Reyee.  all of them do not have a software compatibility test feature

Hello Nguyen,
For this case you can reach us at rita chat, one of the engineers will help you with your device.
Also is important to consider do the updates through the cloud, on that case the version available will be the one who is compatible with your device. If you perform the update by yourself manually, is important to read the release notes of every version to see the compatible devices with the firmware.

Regards!