diff --git a/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/UpdateNavProviderHelper.cs b/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/UpdateNavProviderHelper.cs
index 51c270889..875d6f0b1 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/UpdateNavProviderHelper.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/UpdateNavProviderHelper.cs
@@ -75,7 +75,7 @@ namespace SqlSugar
             children = children.Distinct().ToList();
             Check.ExceptionEasy(pkColumn == null, typeof(TChild).Name + " has no primary key", typeof(TChild).Name + "没有主键");
             var whereName = pkColumn.PropertyName;
-            if (_Options.OneToOneSaveByPrimaryKey&& pkColumn.IsPrimarykey==false) 
+            if (_Options?.OneToOneSaveByPrimaryKey==true&& pkColumn.IsPrimarykey==false) 
             {
                 var newPkColumn=this._Context.EntityMaintenance.GetEntityInfo<TChild>().Columns.FirstOrDefault(it => it.IsPrimarykey);
                 if (newPkColumn != null) 
@@ -115,7 +115,7 @@ namespace SqlSugar
                 {
                     ignoreColumns.AddRange(pk.Select(it=>it.PropertyName));
                 }
-                if (_Options.OneToOneSaveByPrimaryKey) 
+                if (_Options?.OneToOneSaveByPrimaryKey==true) 
                 {
                     ignoreColumns = ignoreColumns.Where(it => it != whereName).ToList();
                 }
diff --git a/Src/Asp.NetCore2/SqlSugar/Abstract/ExecuteNavProvider/UpdateNavProviderHelper.cs b/Src/Asp.NetCore2/SqlSugar/Abstract/ExecuteNavProvider/UpdateNavProviderHelper.cs
index 07a3ee8ba..51c270889 100644
--- a/Src/Asp.NetCore2/SqlSugar/Abstract/ExecuteNavProvider/UpdateNavProviderHelper.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Abstract/ExecuteNavProvider/UpdateNavProviderHelper.cs
@@ -115,6 +115,10 @@ namespace SqlSugar
                 {
                     ignoreColumns.AddRange(pk.Select(it=>it.PropertyName));
                 }
+                if (_Options.OneToOneSaveByPrimaryKey) 
+                {
+                    ignoreColumns = ignoreColumns.Where(it => it != whereName).ToList();
+                }
                 if (IsDeleted)
                 {
                     x.AsUpdateable.IgnoreColumns(ignoreColumns.ToArray()).PageSize(1).EnableQueryFilter().ExecuteCommand();