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 ('ccb0cc9910e9f8c146db88d3484b7b0f', -1, 1730415615, 1730415615, '03919b5b', 40, 0, 0)

Line : 195
File : sessions.php