diff --git a/Src/Asp.Net/SqlSugar/Abstract/DeleteProvider/DeleteableProvider.cs b/Src/Asp.Net/SqlSugar/Abstract/DeleteProvider/DeleteableProvider.cs
index c8944dd76..f2c2524f3 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/DeleteProvider/DeleteableProvider.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/DeleteProvider/DeleteableProvider.cs
@@ -445,7 +445,7 @@ namespace SqlSugar
                         DiffLogColumnInfo addItem = new DiffLogColumnInfo();
                         addItem.Value = row[col.ColumnName];
                         addItem.ColumnName = col.ColumnName;
-                        addItem.ColumnDescription = this.EntityInfo.Columns.First(it => it.DbColumnName.Equals(col.ColumnName, StringComparison.CurrentCultureIgnoreCase)).ColumnDescription;
+                        addItem.ColumnDescription = this.EntityInfo.Columns.Where(it=>it.DbColumnName!=null).First(it => it.DbColumnName.Equals(col.ColumnName, StringComparison.CurrentCultureIgnoreCase)).ColumnDescription;
                         item.Columns.Add(addItem);
                     }
                     result.Add(item);