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 ('714a074dfae97f0f9a3147831f01e25d', -1, 1730419917, 1730419917, '12756811', -1280, 0, 0)

Line : 195
File : sessions.php