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 ('080b31ad9e7d493f4254b37b3421f604', -1, 1714003338, 1714003338, '038fda92', 2, 0, 0)

Line : 187
File : sessions.php