The bean 'Call.FeignClientSpecification' could not be registered. A bean with that name has already been defined and overriding is disabled.

This error indicates that there is a conflict in the Spring bean configuration. The bean named 'Call.FeignClientSpecification' is being registered multiple times, which is not allowed by default. Spring considers this as an error and throws an exception.

To resolve this issue, there are a few possible solutions:

1. Check your codebase for duplicate bean definitions. Make sure you are not accidentally registering the same bean multiple times.

2. If you intentionally have multiple bean definitions for 'Call.FeignClientSpecification', you can enable bean overriding by adding the following property to your application.properties or application.yml file:

   spring.main.allow-bean-definition-overriding=true

However, be cautious when using this approach, as it may lead to unexpected behavior if there are conflicting bean definitions.

3. If you are using Spring Boot, you can use the '@Primary' annotation on one of the bean definitions to specify which one should take precedence in case of conflicts. For example:

   @Primary
   @Bean
   public Call.FeignClientSpecification primaryFeignClientSpecification() {
       // bean definition
   }

This will mark the bean as primary and resolve any conflicts.

I hope this helps! Let me know if you have any further questions.