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 ('84766d2487ab17a8017123d7a28db6f7', -1, 1709589611, 1709589611, '2cc00ffb', -8, 0, 0)

Line : 187
File : sessions.php