phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO iabb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('1233077f547efd9e099df6ee4525f93e', -1, 1560902327, 1560902327, '12d45ae6', 60, 0, 0)

Line : 187
File : sessions.php