To fix the error in any list components where a keyExtractor is in use, update the Component (FlatList etc) to have a string key with .toString(). All keys must now be string values.

Like below;

keyExtractor={item => item.index_id}

to

keyExtractor={item => item.index_id.toString()}

This change is a requirement for all uses of a keyExtractor so that would include React-Native components like; FlatList and ActionSheet.

keyExtractor={(item, index) => index.toString()}

This will solve the warning given by React and React Native.

You could try this solution:

keyExtractor={(item, index) => item + index.toString()}