springboot集成redis 报错@Bean definition illegally overridden by existing bean definition@bean定义被现有bean定义非法重写

在做springboot集成redis时报如下错误：

org.springframework.beans.factory.BeanDefinitionStoreException: Invalid bean definition with name 'cacheManager' defined in class path resource [org/springframework/boot/autoconfigure/cache/RedisCacheConfiguration.class]: @Bean definition illegally overridden by existing bean definition: Generic bean: class [com.muyuer.bee.engine.cache.memory.MemoryCacheManager]; scope=; abstract=false; lazyInit=true; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null; defined in class path resource [applicationContext-bee.xml]

百度居然没有相关文章，google也没有.
没办法只能仔细查看错误信息，关注到@Bean definition illegally overridden by existing bean definition，意思是@bean定义被现有bean定义非法重写，查看org/springframework/boot/autoconfigure/cache/RedisCacheConfiguration.class源码里面有一个@bean 名称为cacheManager，再看自己代码里也有一个同样名称的接口定义，报着试一下，把自己代码里的CacheManager接口改了一个名字，再运行居然成功了。

其实idea提示对错误的说明还是很清楚的了，仔细看看总能找到答案。