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 ('d2935846d0387ba80d6a87d5996b1943', -1, 1714044172, 1714044172, '12e0216b', 5, 0, 0)

Line : 187
File : sessions.php