phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9351f412226ddbb7cba8fcbe2f3ca4eb' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('9351f412226ddbb7cba8fcbe2f3ca4eb', -1, 1769870700, 1769870700, 'd849d851', -4, 0, 0)

Line : 187
File : sessions.php