ML6020 with LTO6 - Encryption field: Application-Managed

We have a ML6020 library - Firmware 660G (latest firmware level) - running Windows 2012

recently upgraded to LTO6 SAS Tape drives (firmware updated to most recent)

How can I change Encryption field to show:  Application-Managed ?  Right now it shows for both library and LTO6 tape drives - None (encryption disabled)

I did not purchase Dell Encryption Key - EKM, because per Dell's ML6000 library documentation encryption can be done with Application Managed software such as Commvault.

Any help would be appreciated!

Prior to upgrade - ML6020 had firmware level 585G.GS003 and Library plus LTO4 tape drives showed Encryption field:  Application Managed.

Thank you.