console.js:288 Warning: Each child in a list should have a unique "key" prop.

Check the render method of PageLayout. See https://fb.me/react-warning-keys for more information.
in WithStyles(ForwardRef(Grid)) (created by PageLayout)
in PageLayout (created by ViewTemplateDetails)
in ViewTemplateDetails (created by Context.Consumer)
in Route (created by RenderRoute)
in Switch (created by RenderRoute)
in Suspense (created by RenderRoute)
in RenderRoute (created by App)
in IntlProvider (created by App)
in div (created by MainLayout)
in PagePermissions (created by MainLayout)
in main (created by MainLayout)
in div (created by MainLayout)
in div (created by MainLayout)
in SubscriptionsProvider (created by MainLayout)
in DatadogProvider (created by MainLayout)
in AppInsightsLogger (created by MainLayout)
in MainLayout (created by App)
in Router (created by BrowserRouter)
in BrowserRouter (created by App)
in ForwardRef (created by AuthProvider)
in AuthProvider (created by App)
in StylesProvider (created by ThemeProvider)
in ThemeProvider (created by ThemeProvider)
in ThemeProvider (created by MainProvider)
in SettingsProvider (created by MainProvider)
in MainProvider (created by App)
in App
in Provider

Beginne damit, die in der Warnung genannte PageLayout-Render-Methode zu lokalisieren und das Problem auf der ViewTemplateDetails-Route zu reproduzieren. Verfolge die Liste, die die Warnung auslöst, und überprüfe anschließend, dass die Konsole beim Rendern der Route leer bleibt.