异常提示

[0x587]

Bug report（问题描述）

我没有作任何修改，突然出现了这个error

Screenshot or Gif（截图或动态图）

	warn	@	vue.runtime.esm.js:619
	checkDuplicateKeys	@	vue.runtime.esm.js:6240
	createChildren	@	vue.runtime.esm.js:6044
	createElm	@	vue.runtime.esm.js:5948
	patch	@	vue.runtime.esm.js:6471
	Vue._update	@	vue.runtime.esm.js:3939
	updateComponent	@	vue.runtime.esm.js:4060
	get	@	vue.runtime.esm.js:4473
	Watcher	@	vue.runtime.esm.js:4462
	mountComponent	@	vue.runtime.esm.js:4067
	./node_modules/vue/dist/vue.runtime.esm.js.Vue.$mount	@	vue.runtime.esm.js:8409
	init	@	vue.runtime.esm.js:3118
	createComponent	@	vue.runtime.esm.js:5972
	createElm	@	vue.runtime.esm.js:5919
	createChildren	@	vue.runtime.esm.js:6047
	createElm	@	vue.runtime.esm.js:5948
	createChildren	@	vue.runtime.esm.js:6047
	createElm	@	vue.runtime.esm.js:5948
	createChildren	@	vue.runtime.esm.js:6047
	createElm	@	vue.runtime.esm.js:5948
	patch	@	vue.runtime.esm.js:6471
	Vue._update	@	vue.runtime.esm.js:3939
	updateComponent	@	vue.runtime.esm.js:4060
	get	@	vue.runtime.esm.js:4473
	Watcher	@	vue.runtime.esm.js:4462
	mountComponent	@	vue.runtime.esm.js:4067
	./node_modules/vue/dist/vue.runtime.esm.js.Vue.$mount	@	vue.runtime.esm.js:8409
	init	@	vue.runtime.esm.js:3118
	createComponent	@	vue.runtime.esm.js:5972
	createElm	@	vue.runtime.esm.js:5919
	createChildren	@	vue.runtime.esm.js:6047
	createElm	@	vue.runtime.esm.js:5948
	patch	@	vue.runtime.esm.js:6471
	Vue._update	@	vue.runtime.esm.js:3939
	updateComponent	@	vue.runtime.esm.js:4060
	get	@	vue.runtime.esm.js:4473
	Watcher	@	vue.runtime.esm.js:4462
	mountComponent	@	vue.runtime.esm.js:4067
	./node_modules/vue/dist/vue.runtime.esm.js.Vue.$mount	@	vue.runtime.esm.js:8409
	init	@	vue.runtime.esm.js:3118
	createComponent	@	vue.runtime.esm.js:5972
	createElm	@	vue.runtime.esm.js:5919
	createChildren	@	vue.runtime.esm.js:6047
	createElm	@	vue.runtime.esm.js:5948
	patch	@	vue.runtime.esm.js:6471
	Vue._update	@	vue.runtime.esm.js:3939
	updateComponent	@	vue.runtime.esm.js:4060
	get	@	vue.runtime.esm.js:4473
	Watcher	@	vue.runtime.esm.js:4462
	mountComponent	@	vue.runtime.esm.js:4067
	./node_modules/vue/dist/vue.runtime.esm.js.Vue.$mount	@	vue.runtime.esm.js:8409
	init	@	vue.runtime.esm.js:3118
	merged	@	vue.runtime.esm.js:3301
	createComponent	@	vue.runtime.esm.js:5972
	createElm	@	vue.runtime.esm.js:5919
	updateChildren	@	vue.runtime.esm.js:6210
	patchVnode	@	vue.runtime.esm.js:6313
	patch	@	vue.runtime.esm.js:6476
	Vue._update	@	vue.runtime.esm.js:3942
	updateComponent	@	vue.runtime.esm.js:4060
	get	@	vue.runtime.esm.js:4473
	run	@	vue.runtime.esm.js:4548
	flushSchedulerQueue	@	vue.runtime.esm.js:4304
	(anonymous)	@	vue.runtime.esm.js:1980
	flushCallbacks	@	vue.runtime.esm.js:1906
	Promise.then (async)
	timerFunc	@	vue.runtime.esm.js:1933
	nextTick	@	vue.runtime.esm.js:1990
	queueWatcher	@	vue.runtime.esm.js:4396
	update	@	vue.runtime.esm.js:4538
	notify	@	vue.runtime.esm.js:730
	reactiveSetter	@	vue.runtime.esm.js:1055
	(anonymous)	@	vue-router.esm.js:2555
	(anonymous)	@	vue-router.esm.js:2554
	updateRoute	@	vue-router.esm.js:2013
	(anonymous)	@	vue-router.esm.js:1891
	(anonymous)	@	vue-router.esm.js:2000
	step	@	vue-router.esm.js:1730
	step	@	vue-router.esm.js:1737
	step	@	vue-router.esm.js:1737
	runQueue	@	vue-router.esm.js:1741
	(anonymous)	@	vue-router.esm.js:1995
	step	@	vue-router.esm.js:1730
	(anonymous)	@	vue-router.esm.js:1734
	(anonymous)	@	vue-router.esm.js:1980
	(anonymous)	@	vue-router.esm.js:1773
	(anonymous)	@	vue-router.esm.js:1849
	Promise.then (async)
	(anonymous)	@	vue-router.esm.js:1796
	(anonymous)	@	vue-router.esm.js:1817
	(anonymous)	@	vue-router.esm.js:1817
	flatMapComponents	@	vue-router.esm.js:1816
	(anonymous)	@	vue-router.esm.js:1752
	iterator	@	vue-router.esm.js:1959
	step	@	vue-router.esm.js:1733
	step	@	vue-router.esm.js:1737
	step	@	vue-router.esm.js:1737
	(anonymous)	@	vue-router.esm.js:1734
	(anonymous)	@	vue-router.esm.js:1980
	_callee$	@	permission.js:92
	tryCatch	@	runtime.js:62
	invoke	@	runtime.js:296
	prototype.	@	runtime.js:114
	asyncGeneratorStep	@	asyncToGenerator.js:5
	_next	@	asyncToGenerator.js:27
	Promise.then (async)
	asyncGeneratorStep	@	asyncToGenerator.js:15
	_next	@	asyncToGenerator.js:27
	(anonymous)	@	asyncToGenerator.js:34
	F	@	_export.js:36
	(anonymous)	@	asyncToGenerator.js:23
	(anonymous)	@	permission.js:134
	iterator	@	vue-router.esm.js:1959
	step	@	vue-router.esm.js:1733
	runQueue	@	vue-router.esm.js:1741
	confirmTransition	@	vue-router.esm.js:1988
	transitionTo	@	vue-router.esm.js:1890
	init	@	vue-router.esm.js:2546
	beforeCreate	@	vue-router.esm.js:553
	invokeWithErrorHandling	@	vue.runtime.esm.js:1854
	callHook	@	vue.runtime.esm.js:4213
	Vue._init	@	vue.runtime.esm.js:4998
	Vue	@	vue.runtime.esm.js:5079
	./src/main.js	@	main.js:64
	webpack_require	@	bootstrap:723
	fn	@	bootstrap:100
	1	@	index.vue?04bf:1
	webpack_require	@	bootstrap:723
	(anonymous)	@	bootstrap:790
	(anonymous)	@	bootstrap:790

Link to minimal reproduction（最小可在线还原demo）

Other relevant information（格外信息）

• Your OS: windows10 1903
• Node.js version: 12.15.0
• vue-element-admin version: