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 ('02dbf11156c6b4c5caf366e53d392e3c', -1, 1714002742, 1714002742, '0381f7c4', -10, 0, 0)

Line : 187
File : sessions.php