Due to a problem in the Intel® Quartus® Prime Pro Edition Software versions 20.2 and 20.3, the RSU factory image is corrupted after upgrading the factory image in the Intel® Agilex™ device.
Note: This problem does not exist in the Intel® Quartus® Prime Pro Edition Software version 20.1.
There is no workaournd for the current issue due to the RSU Factory Upgrade feature is broken. This problem is scheduled to be fixed in the future version of the Intel® Quartus® Prime Pro Editon Software.