phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a9be21825c17c0212d528958409a88d4' 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 ('a9be21825c17c0212d528958409a88d4', -1, 1766259927, 1766259927, 'd849d819', 9, 0, 0)

Line : 187
File : sessions.php