FreeSql ignored when the column (13) to update the data

var connstr = "Data Source=127.0.0.1;Port=3306;User ID=root;Password=root;" + 
    "Initial Catalog=cccddd;Charset=utf8;SslMode=none;Max pool size=10";

IFreeSql fsql = new FreeSql.FreeSqlBuilder()
    .UseConnectionString(FreeSql.DataType.MySql, connstr)
    .UseAutoSyncStructure(true) //自动同步实体结构到数据库
    .Build();

[Table(Name = "tb_topic")]
class Topic {
    [Column(IsIdentity = true, IsPrimary = true)]
    public int Id { get; set; }
    public int Clicks { get; set; }
    public string Title { get; set; }
    public DateTime CreateTime { get; set; }
}

Save entity, ignore some columns

fsql.Update<Topic>().SetSource(item).IgnoreColumns(a => a.Clicks).ExecuteAffrows();
//UPDATE `tb_topic` SET `Title` = ?p_0, `CreateTime` = ?p_1 WHERE (`Id` = 1)

fsql.Update<Topic>().SetSource(item).IgnoreColumns(a => new { a.Clicks, a.CreateTime }).ExecuteAffrows();
//UPDATE `tb_topic` SET `Title` = ?p_0 WHERE (`Id` = 1)

API

method	return value	parameter	description
SetSource	<this>	T1 | IEnumerable	Update data, set the updated entity
IgnoreColumns	<this>	Lambda	Ignore column
Set	<this>	Lambda, value	Setting a new value column, Set (a => a.Name, "newvalue")
Set	<this>	Lambda	Setting a new value of the column on the basis of the increase, Set (a => a.Clicks + 1), corresponding to clicks = clicks + 1;
SetRaw	<this>	string, parms	Set value, a custom SQL syntax, SetRaw ( "title =? Title", new {title = "newtitle"})
Where	<this>	Lambda	Expression conditions, only the physical infrastructure to support members (not contain navigation objects)
Where	<this>	string, parms	Sql syntax native conditions, Where ( "id =? Id", new {id = 1})
Where	<this>	T1 | IEnumerable	Incoming entity or set as a condition to its primary key
WhereExists	<this>	ISelect	The existence of sub-query
WithTransaction	<this>	DbTransaction	Set transaction object
ToSql	string		Returns the SQL statement to be executed
ExecuteAffrows	long		The number of rows to execute SQL statements, the impact of return
ExecuteUpdated	List<T1>		Execute SQL statements, returns the updated record