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 ('1ca69c71d038093ab95a5cfc98b3e3e0', -1, 1634971891, 1634971891, '23acd9ae', 33, 0, 0)

Line : 187
File : sessions.php