Warning: Failed child context type: Invalid child context `virtualizedCell.cellKey` of type `number` supplied to `CellRenderer`, expected `string`.

node_modules/fbjs/lib/warning.js:33:20 in printWarning
- node_modules/fbjs/lib/warning.js:57:25 in warning
- node_modules/prop-types/checkPropTypes.js:52:18 in checkPropTypes
- node_modules/react-native/Libraries/Renderer/ReactNativeRenderer-dev.js:11916:8 in processChildContext
- node_modules/react-native/Libraries/Renderer/ReactNativeRenderer-dev.js:11970:46 in invalidateContextProvider
- node_modules/react-native/Libraries/Renderer/ReactNativeRenderer-dev.js:8852:32 in finishClassComponent
- node_modules/react-native/Libraries/Renderer/ReactNativeRenderer-dev.js:8762:6 in updateClassComponent
- node_modules/react-native/Libraries/Renderer/ReactNativeRenderer-dev.js:9581:10 in beginWork
- node_modules/react-native/Libraries/Renderer/ReactNativeRenderer-dev.js:12924:25 in performUnitOfWork
- node_modules/react-native/Libraries/Renderer/ReactNativeRenderer-dev.js:12953:43 in workLoop
- node_modules/react-native/Libraries/Renderer/ReactNativeRenderer-dev.js:12996:17 in renderRoot
- node_modules/react-native/Libraries/Renderer/ReactNativeRenderer-dev.js:13632:34 in performWorkOnRoot
- node_modules/react-native/Libraries/Renderer/ReactNativeRenderer-dev.js:13545:26 in performWork
- node_modules/react-native/Libraries/Renderer/ReactNativeRenderer-dev.js:13506:16 in performSyncWork
- node_modules/react-native/Libraries/Renderer/ReactNativeRenderer-dev.js:13392:6 in requestWork
- node_modules/react-native/Libraries/Renderer/ReactNativeRenderer-dev.js:13259:24 in scheduleWorkImpl
- node_modules/react-native/Libraries/Renderer/ReactNativeRenderer-dev.js:13207:28 in scheduleWork
- node_modules/react-native/Libraries/Renderer/ReactNativeRenderer-dev.js:6224:19 in enqueueSetState
- node_modules/react/cjs/react.development.js:238:31 in setState
* src/containers/RootContainer.tsx:100:3 in <unknown>
- node_modules/redux/lib/redux.js:227:6 in dispatch
- node_modules/redux-observable/lib/cjs/createEpicMiddleware.js:85:26 in <unknown>
* src/core/reduxLoggerMiddleware.ts:28:18 in <unknown>
- node_modules/redux/lib/redux.js:569:33 in dispatch
- node_modules/redux-observable/lib/cjs/createEpicMiddleware.js:75:25 in <unknown>
- node_modules/rxjs/Subscriber.js:242:20 in __tryOrUnsub
- node_modules/rxjs/Subscriber.js:189:34 in next
- node_modules/rxjs/Subscriber.js:129:30 in _next
- node_modules/rxjs/Subscriber.js:93:23 in next
- node_modules/rxjs/operators/switchMap.js:126:34 in notifyNext
- node_modules/rxjs/InnerSubscriber.js:23:31 in _next
- node_modules/rxjs/Subscriber.js:93:23 in next
- node_modules/rxjs/operators/mergeMap.js:145:34 in notifyNext
- node_modules/rxjs/InnerSubscriber.js:23:31 in _next
- node_modules/rxjs/Subscriber.js:93:23 in next
- node_modules/rxjs/operators/mergeMap.js:145:34 in notifyNext
- node_modules/rxjs/InnerSubscriber.js:23:31 in _next
- node_modules/rxjs/Subscriber.js:93:23 in next
- node_modules/rxjs/operators/mergeMap.js:145:34 in notifyNext
- node_modules/rxjs/InnerSubscriber.js:23:31 in _next
- node_modules/rxjs/Subscriber.js:93:23 in next
- node_modules/rxjs/Subscriber.js:129:30 in _next
- node_modules/rxjs/Subscriber.js:93:23 in next
- node_modules/rxjs/operators/map.js:85:30 in _next
- node_modules/rxjs/Subscriber.js:93:23 in next
- node_modules/rxjs/operators/map.js:85:30 in _next
- node_modules/rxjs/Subscriber.js:93:23 in next
* src/helpers/HttpClient.ts:195:26 in <unknown>
- node_modules/promise/setimmediate/core.js:37:14 in tryCallOne
- node_modules/promise/setimmediate/core.js:123:25 in <unknown>
- ... 10 more stack frames from framework internals

libraries/ViewPaper/index.js
this.keyExtractor(item, index)

Start in libraries/ViewPaper/index.js at the keyExtractor call, then trace the rendering path from the reported src/containers/RootContainer.tsx location. Reproduce the gallery rendering that emits the warning and confirm the child context value satisfies CellRenderer's expected type without introducing new warnings.