Thank you for contacting the Intel Technical Support Team.
As per the information provided, it looks like this is a OEM drive, meaning it came with your machine and it could have custom made firmware. I think it is like that because of the firmware version noted on the screenshot: MDV10253 that version is not shown on the revision history for the Intel® Solid State Drive DC P3520 Series.
In order to verify this situation, please provide the ISN or serial number from the physical drive, if you notice, the one on the screenshot is 0000_00000....that is something else that says it could be an OEM drive.
If you do not feel comfortable sharing the serial number here, you can send a private message to me with it.
The revision history can be found on the release notes for the Intel® SSD Data Center Tool (Intel® SSD DCT), section Intel® Solid State Drive DC P3520 Series Revision History: