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 ('623e8da19538cb69eb48c051e79a2c33', -1, 1713587202, 1713587202, '1276e345', -7, 0, 0)

Line : 187
File : sessions.php