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 ('ae979ff2cc29c77e938bda3f56745a1c', -1, 1730416428, 1730416428, '030c4773', 32, 0, 0)

Line : 195
File : sessions.php