Hi Jacob,
If you just want to avoid duplication rows, you don't have to concatenate all those 4 dimensions, just go to the Query Panel -> click on Query Properties tab and uncheck the option "Retrieve duplicate rows" and also, right click on the table in the report and uncheck the option for "Avoid duplicate row aggregation."
Also, do you have any measures that show in the table along with those 4 dimensions? Measure examples: Sales Revenue, Quantity, Count of Items, etc. If so, are you using the Select definition as Sum(table.columnname) and Projection Function as Sum on them in the Universe? If yes, then you shouldn't have duplicate rows for those 4 dimensions.
Apart from that, would you share an image of sample (manufactured) data, how it currently looks and how you want it to look like?
Thanks,
Mahboob Mohammed