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 ('c4a57878534a9d43614b34f9e5d1effb', -1, 1714620783, 1714620783, '12743e2d', -52, 0, 0)

Line : 187
File : sessions.php