phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9681f9c8495e9e8a88236c7c013a8c3c' 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 ('9681f9c8495e9e8a88236c7c013a8c3c', -1, 1758039089, 1758039089, 'd849d822', -4, 0, 0)

Line : 187
File : sessions.php