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 ('e5af9038b023c99a7d410aff6b952380', -1, 1710834360, 1710834360, '035fe96b', 2, 0, 0)

Line : 187
File : sessions.php