It means that rom damaged your phone, system, and relocked bootloader.
If you are not able to unlock bootloader yourself again. Then phone needs to be sent to service.
Service will open phone, make short circuit on test points on motherboard, and flash original chinese rom. Then you will need...
Tried to miflash in fastboot mode
[23:31:09]:1 4b908a5a9905 0,7900451s [23:31:08 4b908a5a9905]:error:FAILED (remote: device is locked. Cannot erase)
india global stable
[23:31:45]:1 4b908a5a9905 0,3100177s [23:31:45 4b908a5a9905]:error:"error : Missmatching...
E:\Redmi6Pro kopia>fastboot devices
E:\Redmi6Pro kopia>fastboot getvar anti
< waiting for device >
finished. total time: 0.004s
Looks like antirollback is OFF, but still locked bootloader
Tried to install china
by fastboot miflash but returns error...