Due to a problem in the Intel® Quartus® Prime Pro Edition Software version 19.1, you may see the above mentioned warning in the ModelSim* GUI when using Intel® Stratix® 10 LVDS SERDES IP.
Device Family: Intel® Stratix® 10
Intel Software: Quartus Prime Pro
Last Modified: September 05, 2019
Version Found: v19.1
Bug ID: 2205699867