8rocket,  You don't need to downgrade. The reason you are seeing this is due to the firmware being newer than the version on the DSU. It is offering the firmware it has, which is AA09, so it is giving you the only option it could. Which is to downgrade. So I wouldn't be concerned with it.   Hope this helps.
Hello,   I recently ran dsu to update the firmware in our R620 servers.   Among all the firmware items, there is a firmware for the controller showing we need to downgrade.   [ ]7 Firmware for - Disk 0 in Backplane 1 of PERC H710P Mini Controller 0 Current Version : AA0D Downgrade to : AA09 I checked the RAID controller current has version 21.3.2_0005 installed.  Is it true that I need to downgrade or this is an error?  And if the downgrade is needed, is there instruction on how do that? Thanks
R620 - RERC H710P Mini Controller Firmware Downgrade