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 ('2943a307a5f7b1c1934ddd92eabc4663', -1, 1711672183, 1711672183, '36a5f8d4', 3, 0, 0)

Line : 187
File : sessions.php