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 ('f993b7cd5d87a17c12919e6fb87dcfce', -1, 1713503911, 1713503911, '340f470f', 4, 0, 0)

Line : 187
File : sessions.php