diff --git a/backend/app/admin/model/role.py b/backend/app/admin/model/role.py
index e3ed954d..f21f820c 100644
--- a/backend/app/admin/model/role.py
+++ b/backend/app/admin/model/role.py
@@ -10,9 +10,15 @@ class Role(Base, TenantMixin):
     """角色表"""
 
     __tablename__ = 'sys_role'
-    __table_args__ = (
-        sa.UniqueConstraint('name', *(['tenant_id'] if settings.TENANT_ENABLED else []), name='uk_sys_role_name'),
-    )
+
+    if settings.TENANT_ENABLED:
+        __table_args__ = (
+            sa.UniqueConstraint('name', 'tenant_id'),
+        )
+    else:
+        __table_args__ = (
+            sa.UniqueConstraint('name'),
+        )
 
     id: Mapped[id_key] = mapped_column(init=False)
     name: Mapped[str] = mapped_column(sa.String(32), comment='角色名称')
diff --git a/backend/app/admin/model/user.py b/backend/app/admin/model/user.py
index 6a8ea389..d6701b86 100644
--- a/backend/app/admin/model/user.py
+++ b/backend/app/admin/model/user.py
@@ -14,14 +14,17 @@ class User(Base, TenantMixin):
     """用户表"""
 
     __tablename__ = 'sys_user'
-    __table_args__ = (
-        sa.UniqueConstraint(
-            'username',
-            *(['tenant_id'] if settings.TENANT_ENABLED else []),
-            name='uk_sys_user_username',
-        ),
-        sa.UniqueConstraint('email', *(['tenant_id'] if settings.TENANT_ENABLED else []), name='uk_sys_user_email'),
-    )
+
+    if settings.TENANT_ENABLED:
+        __table_args__ = (
+            sa.UniqueConstraint('username', 'tenant_id'),
+            sa.UniqueConstraint('email', 'tenant_id'),
+        )
+    else:
+        __table_args__ = (
+            sa.UniqueConstraint('username'),
+            sa.UniqueConstraint('email'),
+        )
 
     id: Mapped[id_key] = mapped_column(init=False)
     uuid: Mapped[str] = mapped_column(sa.String(64), init=False, default_factory=uuid4_str, unique=True)
diff --git a/backend/utils/dynamic_import.py b/backend/utils/dynamic_import.py
index e8885091..51ebbd54 100644
--- a/backend/utils/dynamic_import.py
+++ b/backend/utils/dynamic_import.py
@@ -3,15 +3,10 @@ import inspect
 import os.path
 
 from functools import lru_cache
-from typing import Any, TypeVar
+from typing import Any
 
 import sqlalchemy as sa
 
-from backend.common.exception import errors
-from backend.common.log import log
-
-T = TypeVar('T')
-
 
 @lru_cache(maxsize=128)
 def import_module_cached(module_path: str) -> Any:
@@ -24,22 +19,6 @@ def import_module_cached(module_path: str) -> Any:
     return importlib.import_module(module_path)
 
 
-def dynamic_import_data_model(module_path: str) -> type[T]:
-    """
-    动态导入数据模型
-
-    :param module_path: 模块路径，格式为 'module_path.class_name'
-    :return:
-    """
-    try:
-        module_path, class_name = module_path.rsplit('.', 1)
-        module = import_module_cached(module_path)
-        return getattr(module, class_name)
-    except Exception as e:
-        log.error(f'动态导入数据模型失败：{e}')
-        raise errors.ServerError(msg='数据模型列动态解析失败，请联系系统超级管理员')
-
-
 def get_model_objects(module_path: str) -> list[object] | None:
     """
     获取模型对象