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 ('103b68b2fdb2a513f8a97a5ce355dbbb', -1, 1711645435, 1711645435, '23afac5e', -4, 0, 0)

Line : 187
File : sessions.php