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 ('c8dcf0d7e3535a0dfdb5f85a8b0740e2', -1, 1713570695, 1713570695, '12de4598', -7, 0, 0)

Line : 187
File : sessions.php