Version Found: MIG 7 Series v 2.3 Rev2
Version Resolved: See (Xilinx Answer 54025)
In Vivado 2015.2, the first page of the MIG customization GUI states "This version of MIG is guaranteed to work with Vivado 2014.4, not tested with other Vivado versions."
This is shown in the screen capture below.
Is this incorrect?
This is a GUI error, and can be ignored safely.