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 ('1f3fcdc38596e9f1b17109ad6e8b059b', -1, 1639014803, 1639014803, '2399a66f', 40, 0, 0)

Line : 187
File : sessions.php