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 ('7bd2ae726c3d4fdb6c078c953346b009', -1, 1713800673, 1713800673, '2cd295cd', -10, 0, 0)

Line : 187
File : sessions.php