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 ('a0d58848528b7d21eca260c01ee0455d', -1, 1714305641, 1714305641, '0a020003', -9, 0, 0)

Line : 187
File : sessions.php