string(244) "INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('11c749095876c638cb4bdbf3c94d013e', -1, 1429610380, 1429610380, '36a19b47', 2, 0, 0)" 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 ('11c749095876c638cb4bdbf3c94d013e', -1, 1429610380, 1429610380, '36a19b47', 2, 0, 0)

Line : 192
File : sessions.php