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 ('6e6e4fa6c43d8e2b50c4610553f2e80f', -1, 1713446063, 1713446063, '12dd92df', -7, 0, 0)

Line : 187
File : sessions.php