diff --git a/backend/services/project-management/src/main/java/io/metersphere/project/service/ProjectCustomFieldService.java b/backend/services/project-management/src/main/java/io/metersphere/project/service/ProjectCustomFieldService.java
index 0611965678..488de8d27b 100644
--- a/backend/services/project-management/src/main/java/io/metersphere/project/service/ProjectCustomFieldService.java
+++ b/backend/services/project-management/src/main/java/io/metersphere/project/service/ProjectCustomFieldService.java
@@ -50,6 +50,10 @@ public class ProjectCustomFieldService extends BaseCustomFieldService {
     @Override
     public CustomField update(CustomField customField, List<CustomFieldOptionRequest> options) {
         CustomField originCustomField = getWithCheck(customField.getId());
+        if (originCustomField.getInternal()) {
+            // 内置字段不能修改名字
+            originCustomField.setName(null);
+        }
         customField.setScopeId(originCustomField.getScopeId());
         Project project = projectService.checkResourceExist(originCustomField.getScopeId());
         checkProjectTemplateEnable(project.getOrganizationId(), originCustomField.getScene());
diff --git a/backend/services/project-management/src/test/java/io/metersphere/project/controller/ProjectCustomFieldControllerTests.java b/backend/services/project-management/src/test/java/io/metersphere/project/controller/ProjectCustomFieldControllerTests.java
index 0a433978a0..8a97c04ff2 100644
--- a/backend/services/project-management/src/test/java/io/metersphere/project/controller/ProjectCustomFieldControllerTests.java
+++ b/backend/services/project-management/src/test/java/io/metersphere/project/controller/ProjectCustomFieldControllerTests.java
@@ -176,6 +176,12 @@ public class ProjectCustomFieldControllerTests extends BaseTest {
             Assertions.assertEquals(customField.getId(), optionItem.getFieldId());
         }
 
+        CustomFieldExample example = new CustomFieldExample();
+        example.createCriteria().andScopeIdEqualTo(DEFAULT_PROJECT_ID).andInternalEqualTo(true);
+        request = BeanUtils.copyBean(request, customFieldMapper.selectByExample(example).get(0));
+        this.requestPostWithOk(DEFAULT_UPDATE, request);
+        Assertions.assertEquals(customFieldMapper.selectByExample(example).get(0).getInternal(), true);
+
         // @校验是否开启项目模板
         changeOrgTemplateEnable(true);
         assertErrorCode(this.requestPost(DEFAULT_ADD, request), PROJECT_TEMPLATE_PERMISSION);
diff --git a/backend/services/system-setting/src/main/java/io/metersphere/system/dto/request/DefaultFunctionalCustomField.java b/backend/services/system-setting/src/main/java/io/metersphere/system/dto/request/DefaultFunctionalCustomField.java
index 94401e8c67..8b7eff1341 100644
--- a/backend/services/system-setting/src/main/java/io/metersphere/system/dto/request/DefaultFunctionalCustomField.java
+++ b/backend/services/system-setting/src/main/java/io/metersphere/system/dto/request/DefaultFunctionalCustomField.java
@@ -14,10 +14,10 @@ public enum DefaultFunctionalCustomField {
 
     PRIORITY("functional_priority", CustomFieldType.SELECT,
             Arrays.asList(
+                    getNewOption("P0", "P0"),
                     getNewOption("P1", "P1"),
                     getNewOption("P2", "P2"),
-                    getNewOption("P3", "P3"),
-                    getNewOption("P4", "P4")
+                    getNewOption("P3", "P3")
             )
     );
 
diff --git a/backend/services/system-setting/src/main/java/io/metersphere/system/service/BaseCustomFieldService.java b/backend/services/system-setting/src/main/java/io/metersphere/system/service/BaseCustomFieldService.java
index 5acf048675..0c1ab49953 100644
--- a/backend/services/system-setting/src/main/java/io/metersphere/system/service/BaseCustomFieldService.java
+++ b/backend/services/system-setting/src/main/java/io/metersphere/system/service/BaseCustomFieldService.java
@@ -144,7 +144,7 @@ public class BaseCustomFieldService {
         customField.setScopeId(null);
         customField.setScene(null);
         customField.setScopeType(null);
-        customField.setInternal(false);
+        customField.setInternal(null);
         customField.setCreateUser(null);
         customField.setCreateTime(null);
         customField.setType(null);
diff --git a/backend/services/system-setting/src/main/java/io/metersphere/system/service/OrganizationCustomFieldService.java b/backend/services/system-setting/src/main/java/io/metersphere/system/service/OrganizationCustomFieldService.java
index a3d65a4107..3d62a198f8 100644
--- a/backend/services/system-setting/src/main/java/io/metersphere/system/service/OrganizationCustomFieldService.java
+++ b/backend/services/system-setting/src/main/java/io/metersphere/system/service/OrganizationCustomFieldService.java
@@ -81,6 +81,10 @@ public class OrganizationCustomFieldService extends BaseCustomFieldService {
     @Override
     public CustomField update(CustomField customField, List<CustomFieldOptionRequest> options) {
         CustomField originCustomField = getWithCheck(customField.getId());
+        if (originCustomField.getInternal()) {
+            // 内置字段不能修改名字
+            originCustomField.setName(null);
+        }
         checkOrganizationTemplateEnable(customField.getScopeId(), originCustomField.getScene());
         customField.setScopeId(originCustomField.getScopeId());
         OrganizationService.checkResourceExist(originCustomField.getScopeId());
diff --git a/backend/services/system-setting/src/test/java/io/metersphere/system/controller/OrganizationCustomFieldControllerTests.java b/backend/services/system-setting/src/test/java/io/metersphere/system/controller/OrganizationCustomFieldControllerTests.java
index d71829f395..a0b8e3eeba 100644
--- a/backend/services/system-setting/src/test/java/io/metersphere/system/controller/OrganizationCustomFieldControllerTests.java
+++ b/backend/services/system-setting/src/test/java/io/metersphere/system/controller/OrganizationCustomFieldControllerTests.java
@@ -181,6 +181,12 @@ public class OrganizationCustomFieldControllerTests extends BaseTest {
         }
         assertRefCustomField(customField);
 
+        CustomFieldExample example = new CustomFieldExample();
+        example.createCriteria().andScopeIdEqualTo(DEFAULT_ORGANIZATION_ID).andInternalEqualTo(true);
+        request = BeanUtils.copyBean(request, customFieldMapper.selectByExample(example).get(0));
+        this.requestPostWithOk(DEFAULT_UPDATE, request);
+        Assertions.assertEquals(customFieldMapper.selectByExample(example).get(0).getInternal(), true);
+
         // @校验是否开启组织模板
         changeOrgTemplateEnable(false);
         assertErrorCode(this.requestPost(DEFAULT_UPDATE, request), ORGANIZATION_TEMPLATE_PERMISSION);