phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '88c9ec8d83f2628768934d21e1f0252c' 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 ('88c9ec8d83f2628768934d21e1f0252c', -1, 1766066578, 1766066578, 'd849d83c', 0, 0, 0)

Line : 187
File : sessions.php