BEx query Global variable not changing default value

Hi All,

I have a BEx query in which i have a mandatory Global variable NA_UNIT for which i changes the value initially to CU. But now if i am trying to change back the value to EA its not reverting back the changes in the main variable selection screen.

I have copied and created a test query for which this mandatory global variable NA_UNIT is successfully changing the value to EA when i am trying to change the value in this query and same value EA is reflecting in the main variable selection screen.

Regards

Nitin....