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 ('bda069c228327e7e4ffd90addf238f62', -1, 1560712339, 1560712339, '22e57e1d', 33, 0, 0)

Line : 191
File : sessions.php