Treaty of Adrianopol

Why Javakheti is mostly populated by Armenians?
in September 9, 1829. Turkey and Russia signed the Treaty of Adrianopol. according to which they exchanged population. 75000 Meskheti Georgians were resettled to the territory of Ottoman empire while 14000-35000 Armenians were resettled to Javakheti. where after this exchange they have become a majority on Georgian land.