ALV Field Catalog - key field not enabled but field still colorized

Hi ABAP Experts,

In my subroutine Create Field Catalog,  the column Sold-to Party is always be color-coded in display although I disabled the KEY field catalog option ( WA_FCAT-KEY = 'X' ).  I also tried to re-activate the report many times but it did not work.

Thanks in advance,

Danny