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 ('b5338b0d4be4ad36e59200e5ce01564c', -1, 1713856451, 1713856451, '038fe552', -4, 0, 0)

Line : 187
File : sessions.php