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LP8764-Q1: EEPROM Unlock Failed after programming

Part Number: LP8764-Q1

Hi, 

we can program the LP87641 chip for the first time when we would like to program it again. we received the "EEPROM Unlocked Fail" message from the GUI web page.
It makes us confused, we didn't choose to lock the device in the last step.

Has any way to unlock the chip? please advise. 

thanks!

Chris