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 ('a39d90d6c33697ef5a7ac15e41b9a86c', -1, 1711628731, 1711628731, '2cc82861', -7, 0, 0)

Line : 187
File : sessions.php