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 ('427a9feaa8846930e8933fba263d3294', -1, 1713512861, 1713512861, '127428b1', -4, 0, 0)

Line : 187
File : sessions.php