A props object containing a "key" prop is being spread into JSX:
  let props = %s;
  <%s {...props} />
React keys must be passed directly to JSX without using spread:
  let props = %s;
  <%s key={someKey} {...props} /> {key: someKey, onEventPress: ..., format24h: ..., date: ..., events: ..., scrollToNow: ..., initialTime: ..., scrollToFirst: ..., scrollOffset: ..., onChangeOffset: ..., showNowIndicator: ..., numberOfDays: ..., timelineLeftInset: ...} Timeline {onEventPress: ..., format24h: ..., date: ..., events: ..., scrollToNow: ..., initialTime: ..., scrollToFirst: ..., scrollOffset: ..., onChangeOffset: ..., showNowIndicator: ..., numberOfDays: ..., timelineLeftInset: ...} Timeline