According to a 2015 article by Ivan Dikov published by "Archaeology in Bulgaria," renowned Bulgarian historians want to set historical records straight based on recent findings and as a response to politically-based, inaccurate Mainstream narratives.  

Among the list of making “right the wrongs" in textbooks, these Bulgarian historians want the Bulgarian Ministry of Education to:

(1)  Teach “about the Ancient Iranian World, i.e. Persia, because the Ancient Bulgars appear to have originated from it”…

(2) Teach the following about the origin of the Ancient Bulgars:

...“the theory about the Turkic (Mongol) origin of the Ancient Bulgars has been largely discredited since the fall of the communist regime. Taking advantage of the newly established academic freedom, a number of Bulgarian historians and archaeologists have formulated and explored the theory about the Iranian (Sarmatian, Scythian), i.e. Aryan origin of the Bulgars”…

And that “today’s Bulgarian society has adopted a more balanced approach to the issue, with the theories stipulating the Iranian (Aryan) origin of the Ancient Bulgars (with or without Turkic influences) appearing to dominate the public discourse.”

[pic NASA/Wikipedia @ Archaeology in Bulgaria:  “The region north of the Caucasus Mountain was where the Ancient Bulgars established Bulgaria (the First Bulgarian Empire) in 165 AD, according to recent findings in Ancient Armenian sources, a hypothesis confirmed by the manuscript called Nominalia of the Bulgarian Khans”…for educational purposes only]