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 ('08628990d8147267f3c794316f83d0f8', -1, 1713551713, 1713551713, '03916c09', -11, 0, 0)

Line : 187
File : sessions.php