Spring while upgrading spring boot 3.4.3 facing issue

Error starting ApplicationContext. To display the condition evaluation report re-run your application with 'debug' enabled.
25-03-12 Wed 20:25:42.095 [main] ERROR o.s.boot.SpringApplication 857 - Application run failed
org.springframework.beans.factory.BeanDefinitionStoreException: Invalid bean definition with name 'com.bmg.partners.ppa.service.client.BusClient' defined in null: Invalid value type for attribute 'factoryBeanObjectType': java.lang.String
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryBean(AbstractAutowireCapableBeanFactory.java:858)
    at org.springframework.beans.factory.support.AbstractBeanFactory.isTypeMatch(AbstractBeanFactory.java:665)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:631)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:590)
    at org.springframework.beans.factory.BeanFactoryUtils.beanNamesForTypeIncludingAncestors(BeanFactoryUtils.java:264)
    at org.springframework.security.config.annotation.web.configuration.OAuth2ClientConfiguration$OAuth2AuthorizedClientManagerRegistrar.getBeanNamesForType(OAuth2ClientConfiguration.java:418)
    at org.springframework.security.config.annotation.web.configuration.OAuth2ClientConfiguration$OAuth2AuthorizedClientManagerRegistrar.postProcessBeanDefinitionRegistry(OAuth2ClientConfiguration.java:186)
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:349)
    at org.springframewo

Comment From: bclozel

Thanks for getting in touch, but it feels like this is a question that would be better suited to StackOverflow. As mentioned in the guidelines for contributing, we prefer to use GitHub issues only for bugs and enhancements. Feel free to update this issue with a link to the re-posted question (so that other people can find it) or add some more details if you feel this is a genuine bug.

Comment From: jhoeller

A quick hint: We used to ignore unsupported values for that factoryBeanObjectType attribute, and as of #29799 in 6.1, we reject unsupported values. This has been fixed across the wider Spring portfolio so that the factoryBeanObjectType attribute is only set with a Class or ResolvableType value. You need to double check where that attribute is being set for your BusClient bean, either removing the attribute completely (it was effectively ignored even before) or changing its value type.