Thank you for the update. This tells that the unit is able to work with more than 4 modules at the time. Now let’s see if we can narrow down the issue in D1 or H1. Go ahead and install a memory module in D1 see if it works, and then do the same for H1.
The BMC keeps a historical record of the events of the unit. In this case, you should be able to run the update when you only have 6 modules installed.