Updating EEPROM MAC address Erased it to junk values , now nano (3448)does not boot, How to Fix it

Hi,
I am using a Nano developmental board(one with SD card)
I was trying to update MAC in config EEPROM(I2c address 0x50).
I think with my code rather than updating I erased the EEPROM
Now , after power cycle the board does not boot.
I am getting only 1 byte 00 in boot console.
Can some one help me Fix it?

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