phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO oka_phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('d0473fd25ba02084e01a854920d4035a', -1, 1539984361, 1539984361, '365ca077', 40, 0)

Line : 182
File : /home/c128/public_html/talk/includes/sessions.php