My device not stable after update

Hello,
I have RB951G-2HnD and updating it to 6.49.8 (long term).
Now it shows ip address 0.0.0.0 in winbox and when I connect with mac address it gets disconnected in 4 seconds.
I configured netinstall and it didn’t find my device.
I don’t know what to do now?

Do you know what version it was running befor the upgrade?
Have you followed the wiki on Netinstall?

https://wiki.mikrotik.com/wiki/Manual:Netinstall

Also, what version of WinBox? Older versions of WinBox won’t work right with newer versions of RouterOS.

The previous version was 6.48.3. I read this article completely, but Netinstall can't find my device, even after restarting the device settings, the IP is still 0.0.0.0, and maybe that's why Netinstall can't find it.

I use the latest version

This means your device is not going through the netinstall process…
Hold reset when powering on and hold until it appears in netinstall window. Then release.