header data not getting updated in line item level

Hi,

We are trying to update Pricing date at header level but it is not gettting copied to item level.

getting an message "The header business data does not apply to item xxxx"

i have checked the item category and "business item" field is checked. and for the same sales order previously we were able to change the pricing date at header level and it got applied to item level but this time is is not getting applied.

kindly suggest.