cannot upgrade because boot firmware on master is tainted

Hello Team, 

We have SPS with 6.2.X version and I'm trying to upgrade to 7.0 LTS version but after uploading 7.0 following image  (One Identity Safeguard for Privileged Sessions 7.0 LTS - 7.0 - 7.0.0 install cdrom) in Test it's giving below error. 

"cannot upgrade because boot firmware on master is tainted"