How to Solve CGDI MB Read W169 AKL EEPROM Showing FF FF Error?

Customer problem:

W169 key lost. After reading EEPROM files from EIS with CGDI Prog MB I made two keys but the two slots are now showing FF FF, and the remaining unused slots turned used.

Does anyone see this phenomenon before?

The solution:

You got an ignition switch with incorrect flash, most likely someone tried to replace it and mismatched flash data.

Look for the correct EIS, move EEPROM (collected on CGDI MB programmer) and you are ready to go.