Hi bharath.gk,
There’s a a known issue about backup script in JP6.0GA(R36.3.0).
Please apply the patch from following thread.
Using the initrd tool to flash the image extracted from backup_restore - #21 by DaveYYY
nvrestore_partitions.sh: You are trying to flash images from a board model that does not
match the current board you're flashing onto.
From the restore log you shared, it seems you backup/restore on different SoM.
Please share the result of cat /etc/nv_boot_control.conf on both boards.