diff --git a/backend/errcode/errcode.go b/backend/errcode/errcode.go
index bac6a1d..9d168b7 100644
--- a/backend/errcode/errcode.go
+++ b/backend/errcode/errcode.go
@@ -12,7 +12,6 @@ var LocalFS embed.FS
 var (
 	ErrPermission          = web.NewBadRequestErr("err-permission")
 	ErrUserNotFound        = web.NewBadRequestErr("err-user-not-found")
-	ErrReadOnly            = web.NewBadRequestErr("err-read-only")
 	ErrPassword            = web.NewBadRequestErr("err-password")
 	ErrInviteCodeInvalid   = web.NewBadRequestErr("err-invite-code-invalid")
 	ErrEmailInvalid        = web.NewBadRequestErr("err-email-invalid")
diff --git a/backend/errcode/locale.zh.toml b/backend/errcode/locale.zh.toml
index ac13825..536e37b 100644
--- a/backend/errcode/locale.zh.toml
+++ b/backend/errcode/locale.zh.toml
@@ -1,9 +1,6 @@
 [err-permission]
 other = "无权操作"
 
-[err-read-only]
-other = "只读模式"
-
 [err-user-not-found]
 other = "用户不存在"
 
diff --git a/backend/internal/middleware/readonly.go b/backend/internal/middleware/readonly.go
index 4ff31d9..eff14f6 100644
--- a/backend/internal/middleware/readonly.go
+++ b/backend/internal/middleware/readonly.go
@@ -6,7 +6,6 @@ import (
 	"github.com/labstack/echo/v4"
 
 	"github.com/chaitin/MonkeyCode/backend/config"
-	"github.com/chaitin/MonkeyCode/backend/errcode"
 )
 
 type ReadOnlyMiddleware struct {
@@ -21,7 +20,10 @@ func (m *ReadOnlyMiddleware) Guard() echo.MiddlewareFunc {
 	return func(next echo.HandlerFunc) echo.HandlerFunc {
 		return func(c echo.Context) error {
 			if m.cfg.ReadOnly && c.Request().Method != http.MethodGet {
-				return errcode.ErrReadOnly
+				return c.JSON(http.StatusOK, echo.Map{
+					"code":    -1,
+					"message": "只读模式下不支持该操作",
+				})
 			}
 			return next(c)
 		}