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 ('fd6ef5eb5ab98d94aa36c8e229c4b089', -1, 1603853678, 1603853678, '12d73e29', 210, 0, 0)

Line : 172
File : sessions.php