Groovy/Grails Ambiguous mapping error with springdoc swagger

This is my controller

package example.infra.adapters.input.api.v1.endpoints

import example.aplication.services.authentication.LoginAuthenticator
import example.aplication.dtos.authentication.CredencialsDTO
import example.aplication.dtos.authentication.AuthenticationTokenDTO
import example.aplication.exceptions.authentication.AuthenticationErrorException

import org.springframework.web.bind.annotation.*
import org.springframework.http.ResponseEntity

import io.swagger.v3.oas.annotations.Operation
import io.swagger.v3.oas.annotations.tags.Tag
import io.swagger.v3.oas.annotations.media.Content
import io.swagger.v3.oas.annotations.media.ExampleObject
import io.swagger.v3.oas.annotations.media.Schema
import io.swagger.v3.oas.annotations.responses.ApiResponse
import io.swagger.v3.oas.annotations.parameters.RequestBody

@RestController
@RequestMapping("/api/v1/authentication")
@Tag(name = "Authentication", description = "User authentication")
class AuthenticationApiController {

    LoginAuthenticator loginAuthenticator

    @PostMapping(value = "/token")
    @Operation(
        summary = "Get authentication token",
        requestBody = @io.swagger.v3.oas.annotations.parameters.RequestBody(
            required = true,
            content = @Content(
                mediaType = "application/json",
                schema = @Schema(implementation = CredencialsDTO),
                examples = [
                    @ExampleObject(
                        value = '{"login": "loginExample", "senha": "senhaExample"}'
                    )
                ]
            )
        ),
        responses = [
            @ApiResponse(
                responseCode = "200",
                description = "Success",
                content = @Content(
                    mediaType = "application/json",
                    schema = @Schema(implementation = AuthenticationTokenDTO),
                    examples = [
                        @ExampleObject(
                            value = '{"token": "abc123", "expiration": "2025-09-03T18:00:00Z"}'
                        )
                    ]
                )
            ),
            @ApiResponse(
                responseCode = "401",
                description = "Incorrect login or password",
                content = @Content()
            )
        ]
    )
    ResponseEntity<?> token(@org.springframework.web.bind.annotation.RequestBody CredencialsDTO credencials) {
        try {
            AuthenticationTokenDTO tokenDto = loginAuthenticator.authenticate(credencials)
            return JsonResponse.success(tokenDto)
        } catch (AuthenticationErrorException e) {
            return JsonResponse.unauthorized()
        }
    }
   
}

This is a simple "getToken" endpoint. But when I try to run my app (grails run-app --port 8080) I have this error:

| Running application... Configuring Spring Security Core ... ... finished configuring Spring Security Core 2025-09-04 14:58:23.510 ERROR --- [ restartedMain] o.s.boot.SpringApplication : Application run failedorg.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration: Invocation of init method failed; nested exception is java.lang.IllegalStateException: Ambiguous mapping. Cannot map 'authenticationApiController' method example.infra.adapters.input.api.v1.endpoints.AuthenticationApiController#token(CredencialsDTO) to {POST [/api/v1/authentication/token]}: There is already 'authenticationApiController' bean method example.infra.adapters.input.api.v1.endpoints.AuthenticationApiController#token() mapped. at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1804) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:955) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:731) at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) at grails.boot.GrailsApp.run(GrailsApp.groovy:99) at grails.boot.GrailsApp.run(GrailsApp.groovy:485) at grails.boot.GrailsApp.run(GrailsApp.groovy:472) at grails.boot.GrailsApp$run.call(Unknown Source) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:125) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:148) at agriwin.Application.main(Application.groovy:15) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) Caused by: java.lang.IllegalStateException: Ambiguous mapping. Cannot map 'authenticationApiController' method example.infra.adapters.input.api.v1.endpoints.AuthenticationApiController#token(CredencialsDTO) to {POST [/api/v1/authentication/token]}: There is already 'authenticationApiController' bean method example.infra.adapters.input.api.v1.endpoints.AuthenticationApiController#token() mapped. at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping$MappingRegistry.validateMethodMapping(AbstractHandlerMethodMapping.java:669) at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping$MappingRegistry.register(AbstractHandlerMethodMapping.java:635) at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.registerHandlerMethod(AbstractHandlerMethodMapping.java:332) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.registerHandlerMethod(RequestMappingHandlerMapping.java:420) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.registerHandlerMethod(RequestMappingHandlerMapping.java:76) at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.lambda$detectHandlerMethods$2(AbstractHandlerMethodMapping.java:299) at java.util.LinkedHashMap.forEach(LinkedHashMap.java:684) at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.detectHandlerMethods(AbstractHandlerMethodMapping.java:297) at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.processCandidateBean(AbstractHandlerMethodMapping.java:266) at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.initHandlerMethods(AbstractHandlerMethodMapping.java:225) at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.afterPropertiesSet(AbstractHandlerMethodMapping.java:213) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.afterPropertiesSet(RequestMappingHandlerMapping.java:205) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1863) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800) ... 26 common frames omitted

Some considerations:

• I don't have another "token" method in any controller of my project.
• Im using java 8 + springboot 2.7.8 + grails 5.3
• My dependencies about spring doc api: 'org.springdoc:springdoc-openapi-ui:1.8.0' and 'org.springdoc:springdoc-openapi-groovy:1.8.0'.
• If I remove "Controller" from my file name and remove from my class declaration, like: AuthenticationApi.groovy -> Class AuthenticationApi {} it works, my project runs normally and my swagger works fine.
• I've tryied to change my method name and no work, had the same problem.
• I see some java examples, and they have a ExampleController.java with anotation @RestController, just it.
• I had see some guys with this problem but they really have 2 methods mapped in a same endPoint and the solution is use @PostMapping(value = "...") to the different endPoints.
• I can't find any groovy/grails project example with spring doc api swagger.

Any sugestions?