ID:20815 When you disable Battery Backup RAM for encryption key storage, you must specify the eFuses or PUF option for the Encryption Key Select.

CAUSE: Cannot disable encryption key in Battery Backup RAM if Encryption Key Select is Battery Backup RAM.

ACTION: Set Encryption Key Select to eFuses or Physical Unclonable Function. Alternatively do not disable encryption key in Battery Backup RAM in security option on the Intel Quartus Prime software Assignments Device and Pin Options menu.