Actually star india had bought rights of many films from viacom18 way back in 2012 and it included Dabangg.... I think post agreement expiry all these will move back to viacom18. Till now star india had rights along with select airings which viacom18 reserved for its chs
There is a similar agreement between UTV (pre star india acquisition) and viacom18 which is still on where films from viacom18 library has select airings on UTV Movies .... Brothers, Ae Dil Hai Mushkil, Humpty Sharma ki Dulhaniya, Tevar, Special 26, Hasee Toh Phasee etc get aired on UTV Movies as part of it.
Let's see what future beholds, these may or may not continue. With sony-zee merger, who knows there can b partnership between star / disney and viacom18 too , already they have strong bond in sports genre, Jio Mami Film Festival and even A&E TV18 pact