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 ('c1124e0e09b22e61d74f98ed59d9ab33', -1, 1590671924, 1590671924, '12cce375', 14, 0, 0)

Line : 187
File : sessions.php