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 ('b661f18b02e2275b4140e6e0156690c5', -1, 1560894850, 1560894850, '035482fc', 55, 0, 0)

Line : 187
File : sessions.php