phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO cantautore_phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin, is_robot) VALUES ('3ad4aa47e18ab203c4d4b5f889f7941c', -1, 1714146651, 1714146651, '0381469d', -33, 0, '0', '0')

Line : 175
File : sessions.php