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 ('f89cde36b917e7fb95ab7180a4093d52', -1, 1730418749, 1730418749, '03176501', -4, 0, 0)

Line : 187
File : sessions.php