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 ('bd78e4c7dd32e77b13a76686ea7d580e', -1, 1713997916, 1713997916, '12bfbd55', 7, 0, 0)

Line : 187
File : sessions.php