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 ('33d43c22ca3cfbee8cb6e5fce104fabf', -1, 1713912323, 1713912323, '0d3a97e7', 5, 0, 0)

Line : 187
File : sessions.php