The property `spring.main.allow-bean-definition-overriding` has been set to false for all apps. Check your Spring configuration and make sure to use `ResourceAwareXmlBeanDefinitionReader` when importing XML files into Spring Java configuration classes if your app fails to start and complains about overridden bean definitions. If bean definition overriding is required in your setting, just set `spring.main.allow-bean-definition-overriding=true`.

(CMS-18893)