phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '809d439e8ec7e542e46f1cd62be38b39' 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 ('809d439e8ec7e542e46f1cd62be38b39', -1, 1771214787, 1771214787, 'd849d8a7', -9, 0, 0)

Line : 187
File : sessions.php