CREATE PROCEDURE Error #7

CREATE PROCEDURE AddTrade
@buyerId nvarchar(50),
@platform INT,
@mobile varchar(20),
@telephone varchar(20),
@orderId varchar(50),
@fullname nvarchar(20)
AS
BEGIN
    if not exists(select 1 from [Account] where id=@buyerId)
    begin
        INSERT INTO [Account](id) VALUES(@buyerId)
    end
    if not exists(select 1 from [Mobile] where id=@mobile)
    begin
        INSERT INTO [Mobile](id) VALUES(@mobile)
    end
    if @telephone <> @mobile and not exists(select 1 from [Mobile] where id=@telephone)
    begin
        INSERT INTO [Mobile](id) VALUES(@telephone)
    end
    if not exists(select 1 from [Trade] where orderId=@orderId)
    begin
        INSERT INTO [Trade](orderId,[platform],fullname) VALUES(@orderId,@platform,@fullname)
    end

    INSERT EDGE INTO Account.HasTrade
           SELECT a,t FROM Account a , Trade t
               WHERE a.id = @buyerId AND t.orderId = @orderId ;
    INSERT EDGE INTO Account.UseMobile
           SELECT a,t FROM Account a , Mobile t
               WHERE a.id = @buyerId AND t.id = @mobile ;


    INSERT EDGE INTO Mobile.HasTrade
            SELECT a,t FROM Mobile a , Trade t
                WHERE a.id = @mobile AND t.orderId = @orderId ;


    INSERT EDGE INTO Mobile.HasAccount
            SELECT a,t FROM Mobile a , Account t
                WHERE a.id = @mobile AND t.id = @buyerId ;




    INSERT EDGE INTO Trade.UseAccount
            SELECT t,a FROM Account a , Trade t
                WHERE a.id = @buyerId AND t.orderId = @orderId ;

    INSERT EDGE INTO Trade.UseSecMobile
            SELECT t,a FROM Mobile a , Trade t
                WHERE a.id = @telephone AND t.orderId = @orderId ;
    INSERT EDGE INTO Trade.UseMainMobile
            SELECT t,a FROM Mobile a , Trade t
                WHERE a.id = @mobile AND t.orderId = @orderId ;

    if not (@telephone=@mobile) -- the same as @telephone<>@mobile
    begin
  INSERT EDGE INTO Account.UseMobile
            SELECT a,t FROM Account a , Mobile t
                WHERE a.id = @buyerId AND t.id = @telephone ;

        INSERT EDGE INTO Mobile.HasTrade
            SELECT a,t FROM Mobile a , Trade t
                WHERE a.id = @telephone AND t.orderId = @orderId ;

        INSERT EDGE INTO Mobile.HasAccount
                SELECT a,t FROM Mobile a , Account t
                    WHERE a.id = @telephone AND t.id = @buyerId ;
    end

END"

    if (@telephone=@mobile)
    begin
               return 
    end
INSERT EDGE INTO Account.UseMobile
            SELECT a,t FROM Account a , Mobile t
                WHERE a.id = @buyerId AND t.id = @telephone ;

        INSERT EDGE INTO Mobile.HasTrade
            SELECT a,t FROM Mobile a , Trade t
                WHERE a.id = @telephone AND t.orderId = @orderId ;

        INSERT EDGE INTO Mobile.HasAccount
                SELECT a,t FROM Mobile a , Account t
                    WHERE a.id = @telephone AND t.id = @buyerId ;