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 ('83a4e087cc1c34e49ceae7026ff17dc6', -1, 1603854617, 1603854617, '12d73e29', 91, 0, 0)

Line : 172
File : sessions.php