diff --git a/Falcon.SugarApi/DatabaseDefinitions/SugarTableBase.cs b/Falcon.SugarApi/DatabaseDefinitions/SugarTableBase.cs
index 6eabec9..49b9ad8 100644
--- a/Falcon.SugarApi/DatabaseDefinitions/SugarTableBase.cs
+++ b/Falcon.SugarApi/DatabaseDefinitions/SugarTableBase.cs
@@ -17,23 +17,23 @@ namespace Falcon.SugarApi.DatabaseDefinitions
         /// <summary>
         /// 创建人
         /// </summary>
-        [SugarColumn(IsOnlyIgnoreUpdate = true, IsNullable = false, ColumnDescription = "首次创建人")]
-        public string CreateBy { get; set; }
+        [SugarColumn(IsOnlyIgnoreUpdate = true, IsNullable = true, ColumnDescription = "首次创建人")]
+        public string? CreateBy { get; set; }
         /// <summary>
         /// 创建时间
         /// </summary>
-        [SugarColumn(IsOnlyIgnoreUpdate = true, IsNullable = false, ColumnDescription = "首次创建时间")]
-        public DateTime CreateTime { get; set; } = DateTime.Now;
+        [SugarColumn(IsOnlyIgnoreUpdate = true, IsNullable = true, ColumnDescription = "首次创建时间")]
+        public DateTime? CreateTime { get; set; } = DateTime.Now;
         /// <summary>
         /// 更新人
         /// </summary>
-        [SugarColumn(IsNullable = false, ColumnDescription = "最近更新人")]
-        public string UpdateBy { get; set; }
+        [SugarColumn(IsNullable = true, ColumnDescription = "最近更新人")]
+        public string? UpdateBy { get; set; }
         /// <summary>
         /// 更新时间
         /// </summary>
-        [SugarColumn(IsNullable = false, ColumnDescription = "最新更新时间")]
-        public DateTime UpdateTime { get; set; } = DateTime.Now;
+        [SugarColumn(IsNullable = true, ColumnDescription = "最新更新时间")]
+        public DateTime? UpdateTime { get; set; } = DateTime.Now;
         /// <summary>
         /// 记录状态
         /// </summary>