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 ('13a07595ff0eda9dbe15eb3d8ec2d0f6', -1, 1714065766, 1714065766, '038bee4c', 0, 0, 0)

Line : 187
File : sessions.php