problem in new_tumor_event_after_initial_treatment in XML clinical data

[AlirezaShokrollahi]

Hello When I used TCGAbiolinks for downloading clinical data, I found a problem in XML clinical data. In XML clinical data, There is a column that shows new_tumor_event_after_initial_treatment or new tumor event. For some TCGA projects like TCGA-BRCA, most values in this column are not available or unknown. But in files that we can download from GDC directly, most values in this column are YES or NO. could you help me please and explain what happened. Thank you.