Concatenatetext measure, not custom column with grand total in blank

[dobregon]

Hi,

I'm trying to do create a measure that concatenate all the unique row values in a column but with a blank in the total, not in the subtotals. example

GROUP	ITEM	DATE	COUNTRY
PRIORITY	1	1/1/2019	SPAIN
PRIORITY	1	2/1/2019	SPAIN
PRIORITY	1	3/1/2019	SPAIN
PRIORITY	1	4/1/2019	SPAIN
PRIORITY	1	5/1/2019	SPAIN
PRIORITY	2	1/1/2019	FRANCE
PRIORITY	2	2/1/2019	FRANCE
PRIORITY	2	3/1/2019	FRANCE
PRIORITY	2	4/1/2019	FRANCE
PRIORITY	2	5/1/2019	FRANCE
NOT PRIORITY	3	1/1/2019	EEUU
NOT PRIORITY	3	2/1/2019	EEUU
NOT PRIORITY	3	3/1/2019	EEUU
NOT PRIORITY	3	4/1/2019	EEUU
NOT PRIORITY	3	5/1/2019	EEUU
NOT PRIORITY	4	1/1/2019	GERMANY
NOT PRIORITY	4	2/1/2019	GERMANY
NOT PRIORITY	4	3/1/2019	GERMANY
NOT PRIORITY	4	4/1/2019	GERMANY
NOT PRIORITY	4	5/1/2019	GERMANY

And I want to concatenate the unique values per item and show the values per item, per group and in the total i want to see a blank. I have done the following measure

Countries = 
CONCATENATEX (
    SUMMARIZE (
        FILTER ( Metadata, Metadata[Country] <> BLANK () ),
        Metadata[Country]
    ),
    Metadata[Country],
    ","
)

and the problem is that the result is

GROUP	ITEM	COUNTRY
NOT PRIORITY	3	EEUU
NOT PRIORITY	4	GERMANY
NOT PRIORITY Total		EEUU, GERMANY
PRIORITY	1	SPAIN
PRIORITY	2	FRANCE
PRIORITY Total		SPAIN, FRANCE
Grand Total		EEUU, GERMANY,SPAIN, FRANCE

when in reiality for the big total i want to see a blank

GROUP	ITEM	COUNTRY
NOT PRIORITY	3	EEUU
NOT PRIORITY	4	GERMANY
NOT PRIORITY Total		EEUU, GERMANY
PRIORITY	1	SPAIN
PRIORITY	2	FRANCE
PRIORITY Total		SPAIN, FRANCE
Grand Total

it could be possible?

Kind regards!!!