diff --git a/src/main/java/org/ays/common/exception/handler/GlobalExceptionHandler.java b/src/main/java/org/ays/common/exception/handler/GlobalExceptionHandler.java
index 10f144900..b73215fd7 100644
--- a/src/main/java/org/ays/common/exception/handler/GlobalExceptionHandler.java
+++ b/src/main/java/org/ays/common/exception/handler/GlobalExceptionHandler.java
@@ -92,11 +92,11 @@ AysErrorResponse handleNotExistError(final AysNotExistException exception) {
 
     @ExceptionHandler(AysConflictException.class)
     @ResponseStatus(HttpStatus.CONFLICT)
-    AysErrorResponse handleAlreadyExistError(final AysConflictException exception) {
+    AysErrorResponse handleConflictError(final AysConflictException exception) {
         log.error(exception.getMessage(), exception);
 
         return AysErrorResponse.builder()
-                .header(AysErrorResponse.Header.ALREADY_EXIST.getName())
+                .header(AysErrorResponse.Header.CONFLICT_ERROR.getName())
                 .message(exception.getMessage())
                 .build();
     }
diff --git a/src/main/java/org/ays/common/model/response/AysErrorResponse.java b/src/main/java/org/ays/common/model/response/AysErrorResponse.java
index 1e9d29608..8bd25034f 100644
--- a/src/main/java/org/ays/common/model/response/AysErrorResponse.java
+++ b/src/main/java/org/ays/common/model/response/AysErrorResponse.java
@@ -99,9 +99,9 @@ public enum Header {
          */
         API_ERROR("API ERROR"),
         /**
-         * ALREADY_EXIST header.
+         * CONFLICT_ERROR header.
          */
-        ALREADY_EXIST("ALREADY EXIST"),
+        CONFLICT_ERROR("CONFLICT ERROR"),
         /**
          * NOT_FOUND header.
          */
diff --git a/src/test/java/org/ays/auth/controller/AdminRegistrationApplicationEndToEndTest.java b/src/test/java/org/ays/auth/controller/AdminRegistrationApplicationEndToEndTest.java
index 2ce047830..3a7d10961 100644
--- a/src/test/java/org/ays/auth/controller/AdminRegistrationApplicationEndToEndTest.java
+++ b/src/test/java/org/ays/auth/controller/AdminRegistrationApplicationEndToEndTest.java
@@ -518,7 +518,7 @@ void givenValidAdminRegistrationApplicationId_whenApproveAdminRegistrationApplic
         MockHttpServletRequestBuilder mockHttpServletRequestBuilder = AysMockMvcRequestBuilders
                 .post(endpoint, superAdminToken.getAccessToken());
 
-        AysErrorResponse mockErrorResponse = AysErrorResponseBuilder.ALREADY_EXIST;
+        AysErrorResponse mockErrorResponse = AysErrorResponseBuilder.CONFLICT_ERROR;
 
         aysMockMvc.perform(mockHttpServletRequestBuilder, mockErrorResponse)
                 .andExpect(AysMockResultMatchersBuilders.status()
@@ -555,7 +555,7 @@ void givenValidAdminRegistrationApplicationId_whenApproveAdminRegistrationApplic
         MockHttpServletRequestBuilder mockHttpServletRequestBuilder = AysMockMvcRequestBuilders
                 .post(endpoint, superAdminToken.getAccessToken());
 
-        AysErrorResponse mockErrorResponse = AysErrorResponseBuilder.ALREADY_EXIST;
+        AysErrorResponse mockErrorResponse = AysErrorResponseBuilder.CONFLICT_ERROR;
 
         aysMockMvc.perform(mockHttpServletRequestBuilder, mockErrorResponse)
                 .andExpect(AysMockResultMatchersBuilders.status()
@@ -739,7 +739,7 @@ void givenValidAdminRegistrationApplicationRejectRequest_whenRejectAdminRegistra
         MockHttpServletRequestBuilder mockHttpServletRequestBuilder = AysMockMvcRequestBuilders
                 .post(endpoint, superAdminToken.getAccessToken(), rejectRequest);
 
-        AysErrorResponse mockErrorResponse = AysErrorResponseBuilder.ALREADY_EXIST;
+        AysErrorResponse mockErrorResponse = AysErrorResponseBuilder.CONFLICT_ERROR;
 
         aysMockMvc.perform(mockHttpServletRequestBuilder, mockErrorResponse)
                 .andExpect(AysMockResultMatchersBuilders.status()
@@ -779,7 +779,7 @@ void givenValidAdminRegistrationApplicationRejectRequest_whenRejectAdminRegistra
         MockHttpServletRequestBuilder mockHttpServletRequestBuilder = AysMockMvcRequestBuilders
                 .post(endpoint, superAdminToken.getAccessToken(), rejectRequest);
 
-        AysErrorResponse mockErrorResponse = AysErrorResponseBuilder.ALREADY_EXIST;
+        AysErrorResponse mockErrorResponse = AysErrorResponseBuilder.CONFLICT_ERROR;
 
         aysMockMvc.perform(mockHttpServletRequestBuilder, mockErrorResponse)
                 .andExpect(AysMockResultMatchersBuilders.status()
diff --git a/src/test/java/org/ays/auth/controller/AysRoleControllerTest.java b/src/test/java/org/ays/auth/controller/AysRoleControllerTest.java
index 53d4ccceb..a63065f2a 100644
--- a/src/test/java/org/ays/auth/controller/AysRoleControllerTest.java
+++ b/src/test/java/org/ays/auth/controller/AysRoleControllerTest.java
@@ -898,7 +898,7 @@ void givenValidIdForPassivation_whenRoleUsing_thenReturnConflict() throws Except
         MockHttpServletRequestBuilder mockHttpServletRequestBuilder = AysMockMvcRequestBuilders
                 .patch(endpoint, mockSuperAdminToken.getAccessToken());
 
-        AysErrorResponse mockErrorResponse = AysErrorResponseBuilder.ALREADY_EXIST;
+        AysErrorResponse mockErrorResponse = AysErrorResponseBuilder.CONFLICT_ERROR;
 
         aysMockMvc.perform(mockHttpServletRequestBuilder, mockErrorResponse)
                 .andExpect(AysMockResultMatchersBuilders.status()
@@ -986,7 +986,7 @@ void givenValidId_whenRoleAlreadyDeleted_thenReturnConflict() throws Exception {
         MockHttpServletRequestBuilder mockHttpServletRequestBuilder = AysMockMvcRequestBuilders
                 .delete(endpoint, mockAdminToken.getAccessToken());
 
-        AysErrorResponse mockErrorResponse = AysErrorResponseBuilder.ALREADY_EXIST;
+        AysErrorResponse mockErrorResponse = AysErrorResponseBuilder.CONFLICT_ERROR;
 
         aysMockMvc.perform(mockHttpServletRequestBuilder, mockErrorResponse)
                 .andExpect(AysMockResultMatchersBuilders.status()
@@ -1014,7 +1014,7 @@ void givenValidId_whenRoleUsing_thenReturnConflict() throws Exception {
         MockHttpServletRequestBuilder mockHttpServletRequestBuilder = AysMockMvcRequestBuilders
                 .delete(endpoint, mockAdminToken.getAccessToken());
 
-        AysErrorResponse mockErrorResponse = AysErrorResponseBuilder.ALREADY_EXIST;
+        AysErrorResponse mockErrorResponse = AysErrorResponseBuilder.CONFLICT_ERROR;
 
         aysMockMvc.perform(mockHttpServletRequestBuilder, mockErrorResponse)
                 .andExpect(AysMockResultMatchersBuilders.status()
diff --git a/src/test/java/org/ays/common/model/response/AysErrorResponseBuilder.java b/src/test/java/org/ays/common/model/response/AysErrorResponseBuilder.java
index 64605d321..cdc23ac66 100644
--- a/src/test/java/org/ays/common/model/response/AysErrorResponseBuilder.java
+++ b/src/test/java/org/ays/common/model/response/AysErrorResponseBuilder.java
@@ -14,8 +14,8 @@ public class AysErrorResponseBuilder {
             .header(AysErrorResponse.Header.AUTH_ERROR.getName())
             .isSuccess(false).build();
 
-    public static final AysErrorResponse ALREADY_EXIST = AysErrorResponse.builder()
-            .header(AysErrorResponse.Header.ALREADY_EXIST.getName())
+    public static final AysErrorResponse CONFLICT_ERROR = AysErrorResponse.builder()
+            .header(AysErrorResponse.Header.CONFLICT_ERROR.getName())
             .isSuccess(false).build();
 
     public static final AysErrorResponse NOT_FOUND = AysErrorResponse.builder()