错误：缺失的款项，用于表"用户"

我使用postgresql和pgadmin和我是新到这一点。 我有一个表"用户"具有下列 (Username, Name, Email, Phone, Discount, Password, token, serial, created_on, updated_on, points, reference). 我是试图建立一个触发表，以便每次一个新插入的发生与现有用户名，在参照场点的用户名将增加50. 因此，有两种行动更新现有的表，插入的新价值。

我试图创造一个触发功能，像这样：

create or replace function points()
returns trigger as 
$BODY$
BEGIN
        if 
        new."Users"."reference" in (old."Users"."username")
        then
        Insert into "Users"(Username,Name,Email,Phone,Discount,Password,token,serial,created_on,updated_on,points,reference)
         values(new.Username,new.Name,new.Email,new.Phone,new.Discount,new.Password,new.token,new.serial,new.created_on,new.updated_on,new.points,new.reference);
        
        
         update "Users"
         set old."Users"."points" = old."Users"."points" + 50
         where "Users"."username" = (select "Users"."username" from "Users" where new."Users"."reference" in (old."Users"."username"));
                                     
                                     
         end if;
    RETURN new;
END;
$BODY$
language plpgsql;

和一个触发这样的：

create trigger referece_points
after insert 
on "Users"
for each row
execute procedure points();

但是，当我试着插入一个新的价值观中的"用户"的表格，我得到的以下错误：

ERROR: missing FROM-clause entry for table "Users" LINE 1: SELECT new."Users"."reference" in (old."Users"."username") ^ Query: SELECT new."Users"."reference" in (old."Users"."username") CONTEXT: PL/pgSQL function points() line 2 at IF