new column in table after refreshing is removed - power query

Hi,

I am quite new to power query.

Now I am importing excel files via power query. Then I add new columns set with drop down list and conditional formatting.

When I add a new excel file (Data_3.xlsx) in the same folder and refresh the excel, I see those new columns (for this example, cause and Status columns) removed.

Is there any way to keep those columns?

Regards
MK