product selected has become invalid

Hi Team,

Please assist us to resolve the below error which is coming after I select the Product from the 'Find Product' page in the sales responsibility. I have attached the screen shot of the same also.

Please note the product selected has become invalid. Please update the products with a valid selection

Moreover, the category assignment is as follows, we don't want any category for the Products. So it is 'default' which is reflecting as follows

Category Set        Control Level         Category

Item Category       Master                   NA.NA (i.e. Family => NA, Kind => NA)

Appreciate your assistance at the earliest.