>>15365742between sintasha and indo-iranians there was also andronovo
>It is almost universally agreed among scholars that the Andronovo culture was Indo-Iranian.[3][28] >In a genetic study published in Science in September 2019, a large number of remains from the Andronovo horizon was examined. The vast majority of Y-DNA extracted belonged to R1a1a1b or various subclades of it (particularly R1a1a1b2a2a).R1a1a1b2a2a is R-Z2123
https://www.familytreedna.com/groups/r-1a-y-haplogroup/about/background 