Error executing stored procedure fails - mysql

Question

I created a stored procedure in mysql database, which fires multiple insert statemets.
As shown below:
DELIMITER //
DROP PROCEDURE IF EXISTS insert_user_group_info
//
CREATE PROCEDURE insert_group_user_info(groupname varchar(50), groupdesc varchar(100),
createddate varchar(50), createdby varchar(100))
BEGIN
DECLARE RETURN_VAL INT UNSIGNED DEFAULT 0;
DECLARE NEWGROUPID INT UNSIGNED DEFAULT 0;
START TRANSACTION;
Insert into group_tbl (`groupname`,
`groupdesc`,
`groupusers`,
`createdon`,
`createdby`,
`groupstatus`)
values
(groupname,
groupdesc,
'1',
createddate,
createdby,
'1');
SET NEWGROUPID = LAST_INSERT_ID();
INSERT INTO useringroup_tbl
( groupid,
username,
regdate,
joindate,
userstatus,
roleid)
VALUES
( NEWGROUPID,
createdby,
createddate,
createddate,
'1',
'1');
INSERT INTO userinrole_tbl
( username,
groupid,
roleid)
VALUES
(createdby,
NEWGROUPID,
'1');
SET RETURN_VAL = LAST_INSERT_ID();
SELECT RETURN_VAL;
COMMIT;
END//
DELIMITER ;
Schema for tables are as follows
Table 1 group_tbl
CREATE TABLE `group_tbl`
(
`groupid` int(11) NOT NULL auto_increment,
`groupname` varchar(50) NOT NULL,
`groupdesc` varchar(100) NOT NULL,
`groupusers` int(11) NOT NULL,
`createdon` datetime NOT NULL,
`createdby` varchar(50) NOT NULL,
`groupstatus` tinyint(4) NOT NULL,
PRIMARY KEY (`groupid`)
);
Table 2 useringroup_tbl
CREATE TABLE IF NOT EXISTS `useringroup_tbl`
(
`groupid` int(11) NOT NULL,
`username` varchar(50) NOT NULL,
`regdate` datetime NOT NULL,
`joindate` datetime NOT NULL default '0000-00-00 00:00:00',
`userstatus` tinyint(4) NOT NULL,
`closingdate` datetime NOT NULL default '0000-00-00 00:00:00',
`roleid` int(11) NOT NULL default '0',
PRIMARY KEY (`groupid`,`username`)
);
Table 3 userinrole_tbl
CREATE TABLE IF NOT EXISTS `userinrole_tbl`
(
`id` int(11) NOT NULL auto_increment,
`username` varchar(50) NOT NULL,
`groupid` int(11) NOT NULL,
`roleid` int(11) NOT NULL,
PRIMARY KEY (`id`)
);
While executing this procedure by this statement
call insert_group_user_info('test name','test description','2015-05-10 12:10:12','XYZuser')
I get an error
1062 - Duplicate entry '1-XYZuser' for key 1
and each time it the number appended to the username gets incremented
like this
1062 - Duplicate entry '2-XYZuser' for key 1
So please if anybody can give me direction what I am doing wrong,
Thanks in advance.

Answer 1

According to the error you have pasted,
1062 - Duplicate entry '1-XYZuser' - PRIMARY KEY (groupid,username) - It doesn't matter if you truncate the tables or not. You might be inserting the same data again.
You might be using last_insert_id() incorrectly.
Why is there no auto_increment in useringroup_tbl?