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 ('5f2aee04637b3d566753bf26b7a63141', -1, 1581984057, 1581984057, '03e9dd95', 3, 0, 0)

Line : 191
File : sessions.php