Hi, I have resolved the issue with the upgrade by rebuilding the OME appliance and re-creating all credentials and adding back the devices- not too happy as i had to spend some time with that., but it's all good now. 
Dell OpenManage Enterprise 3.8.4.7 keeps failing to upgrade to 3.9.0.55Reverting changes every time and restoring back to Version 3.8.4 (Build 7)Please advise.
Unable to upgrade to 3.9.0.55