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 ('8de44a6d7dce2df82453c5c4f1e9c5a2', -1, 1713940165, 1713940165, '0390bb67', 7, 0, 0)

Line : 187
File : sessions.php