Try on this,
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Creating ZMK in RG8000 for exporting its keys
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Online-AUTH[216]>z
Enter ZMK component: 10101010101010101010101010101010
Encrypted ZMK component: 4BE5 1C33 9E04 F56A 4BE5 1C33 9E04 F56A
Key check value: 82E1 3600 0000 0000
Online-AUTH[216]>z
Enter ZMK component: 20202020202020202020202020202020
Encrypted ZMK component: C143 8C55 4779 72C3 C143 8C55 4779 72C3
Key check value: 9772 2000 0000 0000
Online-AUTH[216]>z
Enter ZMK component: 23232323232323232323232323232323
Encrypted ZMK component: C6AE C15B BAD0 64CE C6AE C15B BAD0 64CE
Key check value: 0096 2B00 0000 0000
Online-AUTH[216]>
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Online-AUTH[216]>d
Input components from smartcards? [Y/N]: n
Enter number of components [2-9]: 3
Enter encrypted component 1: 4BE5 1C33 9E04 F56A 4BE5 1C33 9E04 F56A
Enter encrypted component 2: C143 8C55 4779 72C3 C143 8C55 4779 72C3
Enter encrypted component 3: C6AE C15B BAD0 64CE C6AE C15B BAD0 64CE
Encrypted ZMK: 7F6E C17B 1769 05E7 7F6E C17B 1769 05E7
Key check value: A8B7 B500 0000 0000
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Can you tell me what keys you are going export ?
Regards