phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('f1b7b909ecfca6f721c522be751e6fc1', -1, 1714007254, 1714007254, '0389a1de', -10, 0, 0)

Line : 187
File : sessions.php