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bq20z45 unseal process

Please tell me if I am doing this right, because it is not working.

I changed the default Unseal Key and Full Access Key:

New Unseal Key: 0D0C 0B0A

New Full Access Key: 0A0B 0C0D

Not too clever, but this was just practice.  I verified that the keys had updated by reading the keys back before I sealed the device.

So, I think the manual tells me that to Unseal, I transpose and write to 00,  like this:

0D0C 0B0A becomes 0C0D 0A0B

Write 0C0D to 00

Write 0A0B to 00

and the SS flag should go down.   But it does not go down.

I have tried all possible permutations of my new Unseal Key.  Where am I going wrong?