Chatscreen "Each child in a list should have a unique "key" prop"

[FINDarkside]

Warning: Each child in a list should have a unique "key" prop.%s%s See https://fb.me/react-warning-keys for more information.%s, 

Check the render method of `VirtualizedList`., , 
    in CellRenderer (at VirtualizedList.js:851)
    in VirtualizedList (at FlatList.js:633)
    in FlatList (at ChatScreen.js:154)
    in RCTView (at ChatScreen.js:223)
    in RCTView (at ChatScreen.js:222)
    in RCTView (at ChatScreen.js:221)
    in ChatScreen (created by ConnectFunction)