regarding validations in excel

No warning or error message is displayed when the user uploads a file containing duplicate advisor code and Line of business.

I need validation message when I am uploading more than 1 entry with same data. that is if the excel consists same line of business and advisor code then I need this validation message
a!forEach(
items: local!constructData,
expression: if(
count(
index(
fv!item[local!constructData.advisorCode],
wherecontains(
fv!item[local!constructData.lineOfBusiness],
tostring(local!constructData)
)
)
) > 1,
"Duplicate Line of business",
null
)
),