phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '6d9b4d8548abfda722ee427d74f5ea9f' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('6d9b4d8548abfda722ee427d74f5ea9f', -1, 1772232099, 1772232099, 'd849d8d2', 4, 0, 0)

Line : 187
File : sessions.php