phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a536b45171bb3c28589d1f9808319b4c' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('a536b45171bb3c28589d1f9808319b4c', -1, 1771343627, 1771343627, 'd849d87b', 2, 0)

Line : 180
File : /www/includes/sessions.php