React: 경고: "같은 키를 가진 두 자녀를 만났습니다"

아래와 같이 하나의 전체 호출 스택:

warning.js:45 경고: flattenChildren(...): .$outbox81 같은 키를 가진 두 명의 자식이 발생했습니다. 자식 키는 고유해야 합니다. 두 자식이 키를 공유할 때 첫 번째 자식만 사용됩니다.warning @ warning.js:45flattenSingleChildIntoContext @ flattenChildren.js:27traverseAllChildrenImpl @ traverseAllChildren.js:98traverseAllChildrenChildrenImpl @ traverseAllChildren.js:114traverseAllChildren.js:114traverseAllChildren.js:114traverseAllChildren @ :44_reconcilerUpdateChildren @ ReactMultiChild.js:212_updateChildren @ ReactMultiChild.js:351updateChildren @ ReactMultiChild.js:326_updateDOMChildren @ ReactDOMComponent.js:871updateComponent @ ReactDOMComponent.js:871updateComponent @ @ ReactDOMComponent.js:640receiveComponent @ ReactDOMComponent backend.js:8386_updateRenderedComponent @ ReactCompositeComponent.js:562_performComponentUpdate @ ReactCompositeComponent.js:544updateComponent @ ReactCompositeComponent.js:473ReactCompositeComponent_updateComponent @ ReactPerf.js:66receiveComponent @ ReactCompositeComponent.js:408receiveComponent. on) @ backend.js:8386updateChildren @ ReactChildReconciler.js:84_reconcilerUpdateChildren @ ReactMultiChild.js:216_updateChildren @ ReactMultiChild.js:351updateChildren @ ReactMultiChild.js:351updateChildren @ ReactMultiChild.js:326_updateDOMChildren.js:326_updateDOMChildren. @OM ReactReconciler.js:87obj.(익명 함수) @ backend.js:8386updateChildren @ ReactChildReconciler.js:84_reconcilerUpdateChildren @ ReactMultiChild.js:216_updateChildren @ ReactComponentComponent @ ReactMultiChild.js:351updateChildren @ ReactMultiChild_update js:700receiveComponent @ ReactDOMComponent.js:645receiveComponent @ ReactReconciler.js:87obj.(익명 함수) @ backend.js:8386_updateRenderedComponent @ ReactCompositeComponent.js:562_performComponentUpdate @ ReactCompositeComponent.js:544updateComponent.act @ ReactCompositeComponent f.js:66receiveComponent @ ReactCompositeComponent.js:405receiveComponent @ ReactReconciler.js:87obj.(익명 함수) @ backend.js:8386updateChildren @ ReactChildReconciler.js:84_reconcilerUpdateChildren @ ReactMultiChild.js:216_updateChildren @ ReactMultiChild.js:216_updateChildren :326_updateDOMChildren @ ReactDOMComponent.js:871updateComponent @ ReactDOMComponent.js:700receiveComponent @ ReactDOMComponent.js:645receiveComponent @ ReactReconciler.js:87obj.(익명 함수) @backend.js:8386updateChildren_rejscon. ReactComeMultiChild.js:351updateChildren @ ReactMultiChild.js:326_updateDOMChildren @ ReactDOMComponent.js:871updateComponent @ ReactDOMComponent.js:700receiveComponent @ ReactDOMComponent.js:645receiveComponent @ ReactReconciler.js:87obj. :562_performComponentUpdate @ ReactCompos @ReactCompositeComponent.js:473ReactCompositeComponent_updateComponent @ ReactPerf.js:66receiveComponent @ ReactCompositeComponent.js:405receiveComponent @ ReactReconciler.js:87obj.(익명 함수) @ @ backend.js:8386 ReactChildChildren :216_updateChildren @ ReactMultiChild.js:351updateChildren @ ReactMultiChild.js:326_updateDOMChildren @ ReactDOMComponent.js:871updateComponent @ ReactDOMComponent.js:700receiveComponent @ ReactDOMComponent.js:645receiveComponent @ ReactDOMComponent.js:645receiveComponent @ ReactanonyReconcilouser.js:8 ReactDOMComponent.js:871updateComponent @ ReactDOMComponent.js:871updateComponent @ ReactDOMComponent.js:871updateComponent @ ReactDOMComponent.js:70 기능 @ backend.js:8386_updateRenderedComponent @ ReactCompositeComponent.js:562_performComponentUpdate @ ReactCompositeComponent.js:544updateComponent @ ReactCompositeComponent.js:473ReactCompositeComponent_updateComponent @ ReactPerf.js:66receiveComponent @ ReactPerf.js:66receiveComponent @ ReactComposite5receiveerComponent.js:40 backend.js:8386_updateRenderedComponent @ ReactCompositeComponent.js:562_performComponentUpdate @ ReactCompositeComponent.js:544updateComponent @ ReactCompositeComponent.js:473ReactCompositeComponent_updateComponent @ @ ReactPerf.js:66receiveComponent. @ ReactCompositeComponent.js:408receiveComponent. :8386updateChildren @ ReactChildReconciler.js:84_reconcilerUpdateChildren @ ReactMultiChild.js:216_updateChildren @ ReactMultiChild.js:351updateChildren @ ReactMultiChild.js:326_updateDOMChildren @ ReactDOMComponent.js:870updatereComponent @ ReactDOMComponent.js:871updatereComponent eactDOMComponent.js:645receiveComponent @ ReactReconciler.js:87obj.(익명 함수) @ backend.js:8386_updateRenderedComponent @ ReactCompositeComponent.js:562_performComponentUpdate @ ReactCompositeComponent.js:544updateComponent @ ReactCompositeComponent. :405receiveComponent @ ReactReconciler.js:87obj.(익명 함수) @ backend.js:8386_updateRenderedComponent @ ReactCompositeComponent.js:562_performComponentUpdate @ ReactCompositeComponent.js:544updateComponent @ If44updateComponent @ ReactCompositeComponent.js:473ReactCompositeComponent_up ReactReconciler.js:102obj.(익명 함수) @ backend.js:8386runBatchedUpdates @ ReactUpdates.js:129perform @ Transaction.js:136perform @ Transaction.js:136perform @ ReactUpdates.js:86flushBatchedUpdates @ ReactUpdates.js:147React shBatchedUpdates @ ReactPerf.js:66closeAll @ Transaction.js:202perform @ Transaction.js:149batchedUpdates @ ReactDefaultBatchingStrategy.js:62enqueueUpdate @ ReactUpdates.js:176enqueueUpdate @ ReactUpdateQueue.js:24enqueueSetComponent @ ReactUpdateQueue.js.set: @ ReactUpdateQueue.js.set:190Re 65handleChange @ connect.js:301dispatch @ createStore.js:186(익명 함수) @ api.js:91(익명 함수) @ index.js:15(익명 함수) @ middleware.js:22(익명 함수) @ bindActionCreators. js:7hide @ index.js:743handleDocumentClick @ index.js:519
warning.js:45 경고: flattenChildren(...): .$outbox80 같은 키를 가진 두 명의 자식이 발생했습니다. 자식 키는 고유해야 합니다. 두 자식이 키를 공유하면 첫 번째 자식만 사용됩니다.warning @ warning.js:45flattenSingleChildIntoContext @ flattenChildren.js:27traverseAllChildrenImpl @ traverseAllChildren.js:98traverseAllChildrenChildrenImpl @ traverseAllChildren.js:114traverseAllChildren.js:114traverseAllChildren.js:114traverseAllChildren @ :44_reconcilerUpdateChildren @ ReactMultiChild.js:212_updateChildren @ ReactMultiChild.js:351updateChildren @ ReactMultiChild.js:326_updateDOMChildren @ ReactDOMComponent.js:871updateComponent @ ReactDOMComponent.js:871updateComponent @ ReactDOMComponent.js:700receiveComponent @ ReactDOMComponent backend.js:8386_updateRenderedComponent @ ReactCompositeComponent.js:562_performComponentUpdate @ ReactCompositeComponent.js:544updateComponent @ ReactCompositeComponent.js:473ReactCompositeComponent_updateComponent @ ReactPerf.js:66receiveComponent @ ReactCompositeComponent.js:408receiveComponent. on) @ backend.js:8386updateChildren @ ReactChildReconciler.js:84_reconcilerUpdateChildren @ ReactMultiChild.js:216_updateChildren @ ReactMultiChild.js:351updateChildren @ ReactMultiChild.js:351updateChildren @ ReactMultiChild.js:326_updateDOMChildren.js:326_updateDOMChildren.js:326_updateDOMChildren. @OM ReactReconciler.js:87obj.(익명 함수) @ backend.js:8386updateChildren @ ReactChildReconciler.js:84_reconcilerUpdateChildren @ ReactMultiChild.js:216_updateChildren @ ReactComponentComponent @ ReactMultiChild.js:351updateChildren @ ReactMultiChild_update js:700receiveComponent @ ReactDOMComponent.js:645receiveComponent @ ReactReconciler.js:87obj.(익명 기능) @ backend.js:8386_updateRenderedComponent @ ReactCompositeComponent.js:562_performComponentUpdate @ ReactCompositeComponent.js:544updateComponent.act @ ReactCompositeComponent f.js:66receiveComponent @ ReactCompositeComponent.js:405receiveComponent @ ReactReconciler.js:87obj.(익명 함수) @ backend.js:8386updateChildren @ ReactChildReconciler.js:84_reconcilerUpdateChildren @ ReactMultiChild.js:216_updateChildren @ ReactMultiChild.js:216_updateChildren :326_updateDOMChildren @ ReactDOMComponent.js:871updateComponent @ ReactDOMComponent.js:700receiveComponent @ ReactDOMComponent.js:645receiveComponent @ ReactReconciler.js:87obj.(익명 함수) @backend.js:8386updateChildren_rejscon. ReactComeMultiChild.js:351updateChildren @ ReactMultiChild.js:326_updateDOMChildren @ ReactDOMComponent.js:871updateComponent @ ReactDOMComponent.js:700receiveComponent @ ReactDOMComponent.js:645receiveComponent @ ReactReconciler.js:87obj. :562_performComponentUpdate @ ReactCompos @ReactCompositeComponent.js:473ReactCompositeComponent_updateComponent @ ReactPerf.js:66receiveComponent @ ReactCompositeComponent.js:405receiveComponent @ ReactReconciler.js:87obj.(익명 함수) @ @ backend.js:8386 ReactChildChildren :216_updateChildren @ ReactMultiChild.js:351updateChildren @ ReactMultiChild.js:326_updateDOMChildren @ ReactDOMComponent.js:871updateComponent @ ReactDOMComponent.js:700receiveComponent @ ReactDOMComponent.js:645receiveComponent @ ReactDOMComponent.js:645receiveComponent @ ReactanonyReconcilouser.js:8 ReactDOMComponent.js:871updateComponent @ ReactDOMComponent.js:871updateComponent @ ReactDOMComponent.js:871updateComponent @ ReactDOMComponent.js:70 기능 @ backend.js:8386_updateRenderedComponent @ ReactCompositeComponent.js:562_performComponentUpdate @ ReactCompositeComponent.js:544updateComponent @ ReactCompositeComponent.js:473ReactCompositeComponent_updateComponent @ ReactPerf.js:66receiveComponent @ ReactPerf.js:66receiveComponent @ ReactComposite5receiveerComponent.js:40 backend.js:8386_updateRenderedComponent @ ReactCompositeComponent.js:562_performComponentUpdate @ ReactCompositeComponent.js:544updateComponent @ ReactCompositeComponent.js:473ReactCompositeComponent_updateComponent @ @ ReactPerf.js:66receiveComponent @ ReactCompositeComponent.js:408receiveComponent. :8386updateChildren @ ReactChildReconciler.js:84_reconcilerUpdateChildren @ ReactMultiChild.js:216_updateChildren @ ReactMultiChild.js:351updateChildren @ ReactMultiChild.js:326_updateDOMChildren @ ReactDOMComponent.js:870updatereComponent @ ReactDOMComponent.js:871updatereComponent eactDOMComponent.js:645receiveComponent @ ReactReconciler.js:87obj.(익명 함수) @ backend.js:8386_updateRenderedComponent @ ReactCompositeComponent.js:562_performComponentUpdate @ ReactCompositeComponent.js:544updateComponent @ ReactCompositeComponent.js:473 :405receiveComponent @ ReactReconciler.js:87obj.(익명 함수) @ backend.js:8386_updateRenderedComponent @ ReactCompositeComponent.js:562_performComponentUpdate @ ReactCompositeComponent.js:544updateComponent @ If44updateComponent @ ReactCompositeComponent.js:473ReactCompositeComponent_up ReactReconciler.js:102obj.(익명 함수) @ backend.js:8386runBatchedUpdates @ ReactUpdates.js:129perform @ Transaction.js:136perform @ Transaction.js:136perform @ ReactUpdates.js:86flushBatchedUpdates @ ReactUpdates.js:147React shBatchedUpdates @ ReactPerf.js:66closeAll @ Transaction.js:202perform @ Transaction.js:149batchedUpdates @ ReactDefaultBatchingStrategy.js:62enqueueUpdate @ ReactUpdates.js:176enqueueUpdate @ ReactUpdateQueue.js:24enqueueSetComponent @ ReactUpdateQueue.js.set: @ ReactUpdateQueue.js.set:190Re 65handleChange @ connect.js:301dispatch @ createStore.js:186(익명 함수) @ api.js:91(익명 함수) @ index.js:15(익명 함수) @ middleware.js:22(익명 함수) @ bindActionCreators. js:7hide @ index.js:743handleDocumentClick @ index.js:519

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실제 문제가 무엇인지 알려주실 수 있습니까? onReachEnd 메서드 flatlist를 호출할 때 동일한 경고가 표시됩니다.