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) VALUES ('196a666c9b59045ba75996d67a2b5bb6', -1, 1714651976, 1714651976, '1274efc3', 20, 0)

Line : 158
File : sessions.php