WI/AHC: No Indian Rebellion in1857

What would it take to prevent the Indian Rebellion in 1857? What would be the consequences?
 
British East India stay in power, communal relations are less strained and the Mughal dynasty continues. So basically a continuation of 18th century British India, in which there was a lot more syncretism of cultures rather then the complete British hegemony. (In terms of culture).
Also the Anglo - Indian population most likely continues to grow as as the 1857 rebellion lead to a migration of white settlers to administrate the subcontinent, making interracial marriages less necessary and eventually becoming a taboo.
 
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