Order of execution between CommandLineRunner run() method and RabbitMQ listener() method

My Spring Boot application is subscribing to an event via RabbitMQ. Another web application is responsible for publishing the event to the queue which my application is listening to. The event basically contains institute information. The main application class implements CommandLineRunner and overrides run() method. This run() method invokes a method to create admin user.

When my application is started, and when an event is already present in queue, the listener in my application is supposed to update the Admin user's institute id. However it looks like createAdmin() and the listener() are getting executed in parallel and institute id is never updated. Help me in understanding the control flow.

See below the code snippet and the order of print statements.

@SpringBootApplication
public class UserManagementApplication implements CommandLineRunner{

    public static void main(String[] args)  {
        SpringApplication.run(UserManagementApplication.class, args);
    }

    @Override
    public void run(String... args) throws Exception {
        
        createAdmin();
    }
    
    private void createAdmin() {
        System.out.println("************** createAdmin invoked *********************");
        Optional<AppUserEntity> user = appUserService.getUserByUserName("superuser");
        
        if(!user.isPresent()) {
            AppUserEntity superuser = new AppUserEntity();
            superuser.setUsername("superuser");
            superuser.setAppUserRole(AppUserRole.SUPERADMIN);
            
            superuser.setInstId(null); // will be set when Queue receives Institute information 
            
            appUserService.saveUser(superuser);
            System.out.println("************** superuser creation SUCCESSFUL *********************");
        }
    }
}

@Component
public class InstituteQueueListener {

    @RabbitListener(queues = "institute-queue")
    public void updateSuperAdminInstituteId(InstituteEntity institute) {
        
        System.out.println("************** RabbitListener invoked *********************");
        
        Long headInstituteId = institute.getInstId();
        
        Optional<AppUserEntity> user = appUserService.getUserByUserName("superuser");
        if(user.isPresent()) {
            System.out.println("************* superuser is present *****************");
            AppUserEntity superuser = user.get();
            superuser.setInstId(headInstituteId);
            System.out.println("************* Going to save inst Id = "+headInstituteId);
            appUserService.saveUser(superuser);
        }
        
        System.out.println("************** superuser is NOT present (inside Q listener)*********************");
    }

}

Order of print statements ....
(the queue already has event before running my application)
System.out.println("************** createAdmin invoked *********************");
System.out.println("************** RabbitListener invoked *********************");
System.out.println("************** superuser is NOT present (inside Q listener) *********************");
System.out.println("************** superuser creation SUCCESSFUL *********************");