diff --git a/sdk/spring/CHANGELOG.md b/sdk/spring/CHANGELOG.md
index 5a45222c216c..438aa095c637 100644
--- a/sdk/spring/CHANGELOG.md
+++ b/sdk/spring/CHANGELOG.md
@@ -5,6 +5,7 @@ Upgrade Spring Boot dependencies version to 2.7.4 and Spring Cloud dependencies
 
 #### Bugs Fixed
 - Fix bug: Put a value into Collections.emptyMap(). [#31190](https://github.com/Azure/azure-sdk-for-java/issues/31190).
+- Fix bug: Duplicated "scope" parameter. [#31191](https://github.com/Azure/azure-sdk-for-java/issues/31191).
 
 ## 4.4.0 (2022-09-26)
 Upgrade Spring Boot dependencies version to 2.7.3 and Spring Cloud dependencies version to 2021.0.3
diff --git a/sdk/spring/spring-cloud-azure-autoconfigure/src/main/java/com/azure/spring/cloud/autoconfigure/aad/implementation/oauth2/AbstractOAuth2AuthorizationCodeGrantRequestEntityConverter.java b/sdk/spring/spring-cloud-azure-autoconfigure/src/main/java/com/azure/spring/cloud/autoconfigure/aad/implementation/oauth2/AbstractOAuth2AuthorizationCodeGrantRequestEntityConverter.java
index af91381bb842..eefe948c4e36 100644
--- a/sdk/spring/spring-cloud-azure-autoconfigure/src/main/java/com/azure/spring/cloud/autoconfigure/aad/implementation/oauth2/AbstractOAuth2AuthorizationCodeGrantRequestEntityConverter.java
+++ b/sdk/spring/spring-cloud-azure-autoconfigure/src/main/java/com/azure/spring/cloud/autoconfigure/aad/implementation/oauth2/AbstractOAuth2AuthorizationCodeGrantRequestEntityConverter.java
@@ -4,12 +4,11 @@
 package com.azure.spring.cloud.autoconfigure.aad.implementation.oauth2;
 
 import com.azure.spring.cloud.core.implementation.util.AzureSpringIdentifier;
-import org.springframework.core.convert.converter.Converter;
 import org.springframework.http.HttpHeaders;
-import org.springframework.http.RequestEntity;
 import org.springframework.security.oauth2.client.endpoint.OAuth2AuthorizationCodeGrantRequest;
 import org.springframework.security.oauth2.client.endpoint.OAuth2AuthorizationCodeGrantRequestEntityConverter;
 import org.springframework.util.MultiValueMap;
+import org.springframework.util.MultiValueMapAdapter;
 
 import java.util.Collections;
 import java.util.UUID;
@@ -20,6 +19,14 @@
 public abstract class AbstractOAuth2AuthorizationCodeGrantRequestEntityConverter
     extends OAuth2AuthorizationCodeGrantRequestEntityConverter {
 
+    private static final MultiValueMap<String, String> EMPTY_MULTI_VALUE_MAP =
+            new MultiValueMapAdapter<>(Collections.emptyMap());
+
+    protected AbstractOAuth2AuthorizationCodeGrantRequestEntityConverter() {
+        addHeadersConverter(this::getHttpHeaders);
+        addParametersConverter(this::getHttpBody);
+    }
+
     /**
      * Gets the application ID.
      *
@@ -27,23 +34,11 @@ public abstract class AbstractOAuth2AuthorizationCodeGrantRequestEntityConverter
      */
     protected abstract String getApplicationId();
 
-    @Override
-    @SuppressWarnings("unchecked")
-    public RequestEntity<?> convert(OAuth2AuthorizationCodeGrantRequest request) {
-        addHeadersConverter(headersConverter);
-        addParametersConverter(parametersConverter);
-        return super.convert(request);
-    }
-
-    private final Converter<OAuth2AuthorizationCodeGrantRequest, HttpHeaders> headersConverter = (request) -> getHttpHeaders();
-
-    private final Converter<OAuth2AuthorizationCodeGrantRequest, MultiValueMap<String, String>> parametersConverter = this::getHttpBody;
-
     /**
      * Additional default headers information.
      * @return HttpHeaders
      */
-    public HttpHeaders getHttpHeaders() {
+    protected HttpHeaders getHttpHeaders(OAuth2AuthorizationCodeGrantRequest request) {
         HttpHeaders httpHeaders = new HttpHeaders();
         httpHeaders.put("x-client-SKU", Collections.singletonList(getApplicationId()));
         httpHeaders.put("x-client-VER", Collections.singletonList(AzureSpringIdentifier.VERSION));
@@ -56,7 +51,7 @@ public HttpHeaders getHttpHeaders() {
      * @param request OAuth2AuthorizationCodeGrantRequest
      * @return MultiValueMap
      */
-    public MultiValueMap<String, String> getHttpBody(OAuth2AuthorizationCodeGrantRequest request) {
-        return null;
+    protected MultiValueMap<String, String> getHttpBody(OAuth2AuthorizationCodeGrantRequest request) {
+        return EMPTY_MULTI_VALUE_MAP;
     }
 }
diff --git a/sdk/spring/spring-cloud-azure-autoconfigure/src/test/java/com/azure/spring/cloud/autoconfigure/aad/implementation/webapp/AadOAuth2AuthorizationCodeGrantRequestEntityConverterTests.java b/sdk/spring/spring-cloud-azure-autoconfigure/src/test/java/com/azure/spring/cloud/autoconfigure/aad/implementation/webapp/AadOAuth2AuthorizationCodeGrantRequestEntityConverterTests.java
index 1e110859858b..126d019049f0 100644
--- a/sdk/spring/spring-cloud-azure-autoconfigure/src/test/java/com/azure/spring/cloud/autoconfigure/aad/implementation/webapp/AadOAuth2AuthorizationCodeGrantRequestEntityConverterTests.java
+++ b/sdk/spring/spring-cloud-azure-autoconfigure/src/test/java/com/azure/spring/cloud/autoconfigure/aad/implementation/webapp/AadOAuth2AuthorizationCodeGrantRequestEntityConverterTests.java
@@ -5,7 +5,7 @@
 
 import com.azure.spring.cloud.autoconfigure.aad.AadClientRegistrationRepository;
 import com.azure.spring.cloud.autoconfigure.aad.implementation.WebApplicationContextRunnerUtils;
-import org.hamcrest.Matcher;
+import com.azure.spring.cloud.core.implementation.util.AzureSpringIdentifier;
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.runner.WebApplicationContextRunner;
 import org.springframework.http.HttpEntity;
@@ -19,12 +19,12 @@
 import org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationResponse;
 import org.springframework.util.MultiValueMap;
 
+import java.util.Collections;
 import java.util.Optional;
 
 import static com.azure.spring.cloud.autoconfigure.aad.AadClientRegistrationRepository.AZURE_CLIENT_REGISTRATION_ID;
-import static org.hamcrest.CoreMatchers.hasItems;
-import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 class AadOAuth2AuthorizationCodeGrantRequestEntityConverterTests {
 
@@ -62,26 +62,41 @@ void addScopeForAuthorizationCodeClient() {
     }
 
     @Test
-    @SuppressWarnings("unchecked")
+    void onlyAddScopeOnceEvenConvertMethodExecutedMultipleTimes() {
+        getContextRunner().run(context -> {
+            AadClientRegistrationRepository repository =
+                    (AadClientRegistrationRepository) context.getBean(ClientRegistrationRepository.class);
+            AadOAuth2AuthorizationCodeGrantRequestEntityConverter converter =
+                    new AadOAuth2AuthorizationCodeGrantRequestEntityConverter(repository.getAzureClientAccessTokenScopes());
+            ClientRegistration azure = repository.findByRegistrationId(AZURE_CLIENT_REGISTRATION_ID);
+            OAuth2AuthorizationCodeGrantRequest request = createCodeGrantRequest(azure);
+            // Convert method execute 2 times
+            converter.convert(request);
+            RequestEntity<?> entity = converter.convert(request);
+            MultiValueMap<String, String> map = WebApplicationContextRunnerUtils.toMultiValueMap(entity);
+            assertEquals(1, map.get("scope").size());
+        });
+    }
+
+    @Test
     void addHeadersForAzureClient() {
         getContextRunner().run(context -> {
             AadClientRegistrationRepository repository =
                 (AadClientRegistrationRepository) context.getBean(ClientRegistrationRepository.class);
             ClientRegistration azure = repository.findByRegistrationId(AZURE_CLIENT_REGISTRATION_ID);
             HttpHeaders httpHeaders = convertedHeaderOf(repository, createCodeGrantRequest(azure));
-            assertThat(httpHeaders.entrySet(), (Matcher) hasItems(expectedHeaders(repository)));
+            testHttpHeaders(httpHeaders);
         });
     }
 
     @Test
-    @SuppressWarnings("unchecked")
     void addHeadersForAuthorizationCodeClient() {
         getContextRunner().run(context -> {
             AadClientRegistrationRepository repository =
                 (AadClientRegistrationRepository) context.getBean(ClientRegistrationRepository.class);
             ClientRegistration arm = repository.findByRegistrationId("arm");
             HttpHeaders httpHeaders = convertedHeaderOf(repository, createCodeGrantRequest(arm));
-            assertThat(httpHeaders.entrySet(), (Matcher) hasItems(expectedHeaders(repository)));
+            testHttpHeaders(httpHeaders);
         });
     }
 
@@ -95,13 +110,12 @@ private HttpHeaders convertedHeaderOf(AadClientRegistrationRepository repository
                        .orElse(null);
     }
 
-    private Object[] expectedHeaders(AadClientRegistrationRepository repository) {
-        return new AadOAuth2AuthorizationCodeGrantRequestEntityConverter(repository.getAzureClientAccessTokenScopes())
-            .getHttpHeaders()
-            .entrySet()
-            .stream()
-            .filter(entry -> !entry.getKey().equals("client-request-id"))
-            .toArray();
+    private void testHttpHeaders(HttpHeaders headers) {
+        assertTrue(headers.containsKey("x-client-SKU"));
+        assertEquals(Collections.singletonList(AzureSpringIdentifier.AZURE_SPRING_AAD), headers.get("x-client-SKU"));
+        assertTrue(headers.containsKey("x-client-VER"));
+        assertEquals(Collections.singletonList(AzureSpringIdentifier.VERSION), headers.get("x-client-VER"));
+        assertTrue(headers.containsKey("client-request-id"));
     }
 
     private MultiValueMap<String, String> convertedBodyOf(AadClientRegistrationRepository repository,