phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '8d9a8f1ed4b8f3988ad1a611c770e86b' 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 ('8d9a8f1ed4b8f3988ad1a611c770e86b', -1, 1766668229, 1766668229, 'd849d819', 9, 0, 0)

Line : 187
File : sessions.php