diff --git a/Learun.Application.Web/AppApi/ObjectTypeApiController.cs b/Learun.Application.Web/AppApi/ObjectTypeApiController.cs
index 69687a2e..113ee1e8 100644
--- a/Learun.Application.Web/AppApi/ObjectTypeApiController.cs
+++ b/Learun.Application.Web/AppApi/ObjectTypeApiController.cs
@@ -631,7 +631,14 @@ namespace Learun.Application.Web.AppApi
                             //每个位号的属性信息
                             foreach (var tag in objectType.tags)
                             {
-                                tag.CreateUserName = userDict[tag.CreateUserID];// allUser.FirstOrDefault(x => x.F_UserId == item.CreateUserID)?.F_RealName;
+                                if (string.IsNullOrEmpty(tag.CreateUserID))
+                                {
+                                    tag.CreateUserName = string.Empty;
+                                }
+                                else
+                                {
+                                    tag.CreateUserName = userDict[tag.CreateUserID];// allUser.FirstOrDefault(x => x.F_UserId == item.CreateUserID)?.F_RealName;
+                                }
 
                                 tag.EngineDataProperty = tagPropDictByTag[tag.EngineDataID];// tagPropAll.Where(x => x.EngineDataID == tag.EngineDataID).ToList();
                                 tag.ObjectTypeName = objectType.ObjectTypeName;