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 ('995439e09b46f1d8aaa26a73fb6789df', -1, 1713891773, 1713891773, '12742ad0', -2, 0, 0)

Line : 187
File : sessions.php