Slavic and Baltic language families, separated 3100-3400 years ago, this is 1000-1500 years less than the Corded Ware culture Era, while Slavic languages are 1400-1600 years old.it's not sure - Corded could have been proto-satem language speakers, close to proto-slavo-baltic tribes -
I see them becoming 'germanic' in N-W Europe after assimilation into a mix of others people where neolitihical descendants were very seldom, and new ones, rather Y-R1b-U106 and Y-I1 people were the bulk -
the first proto-germanic (centum) element could have been some Y-R1b-U152 group (old northwestern I-Ean, akin to celtic, italic, ligurian, germanic) acculturating the others in the Saale area and then into Jutland and Scandia, with a consonnant drift due, perhaps, to Y-I1 population (not to the haplogroup!)
Possibly Slavic languages came from Steppe region, together with Huns(Hunnic words Strava Med).
The Suobeni/Suoveni (Sloveni?) were between Rha(Volga) river and southern Urals.