diff --git a/Src/Asp.NetCore2/SqlSugar/Abstract/ExecuteNavProvider/InsertNavProviderManyToMany.cs b/Src/Asp.NetCore2/SqlSugar/Abstract/ExecuteNavProvider/InsertNavProviderManyToMany.cs
index 308b8a892..ee9dbc696 100644
--- a/Src/Asp.NetCore2/SqlSugar/Abstract/ExecuteNavProvider/InsertNavProviderManyToMany.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Abstract/ExecuteNavProvider/InsertNavProviderManyToMany.cs
@@ -38,6 +38,10 @@ namespace SqlSugar
             foreach (var item in parentList)
             {
                 var items= parentNavigateProperty.PropertyInfo.GetValue(item);
+                if (items == null)
+                {
+                    continue;
+                }
                 var children=((List<TChild>)items);
                 InsertDatas(children, thisPkColumn);
                 var parentId = parentPkColumn.PropertyInfo.GetValue(item);
diff --git a/Src/Asp.NetCore2/SqlSugar/Abstract/UpdateProvider/UpdateableHelper.cs b/Src/Asp.NetCore2/SqlSugar/Abstract/UpdateProvider/UpdateableHelper.cs
index 059077283..f3efc69fe 100644
--- a/Src/Asp.NetCore2/SqlSugar/Abstract/UpdateProvider/UpdateableHelper.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Abstract/UpdateProvider/UpdateableHelper.cs
@@ -464,7 +464,7 @@ namespace SqlSugar
             it.PropertyName.EqualCase(verColumn.PropertyName));
             if (data == null) 
             {
-                data = new DbColumnInfo() { DbColumnName= verColumn.DbColumnName, Value=newValue };
+                data = new DbColumnInfo() { DbColumnName= verColumn.DbColumnName,PropertyName=verColumn.PropertyName, Value=newValue };
                 this.UpdateBuilder.DbColumnInfoList.Add(data);
             }
             data.Value = newValue;