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 ('94bbdf65bbb42e82a06ce700d8ef8d2d', -1, 1713528830, 1713528830, '12d8e93a', -7, 0, 0)

Line : 187
File : sessions.php