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 ('8e5c4b36c5f0a9e8a3c076d5d27dda82', -1, 1713888778, 1713888778, '12d82074', 5, 0, 0)

Line : 187
File : sessions.php