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 ('a679a4c19f1dfd2bf2a6ed7025a84b9b', -1, 1713495177, 1713495177, '1275b7ac', -7, 0, 0)

Line : 187
File : sessions.php