Exception class: PDOException()

SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '172.71.254.108' for key 'ip'

File: C:\xampp\htdocs\system\libs\visitors.php
Line: 98


Backtrace:

#0 C:\xampp\htdocs\system\libs\visitors.php(98): PDO->exec('INSERT INTO `my...')
#1 C:\xampp\htdocs\system\libs\visitors.php(41): Visitors->addVisitor('172.71.254.108', '/?race=lizardhi...')
#2 C:\xampp\htdocs\index.php(201): Visitors->__construct(10)
#3 {main}