Incremental processing in SSAS tabular model

[SpikeSpiegel_3]

I am trying to process new data and updated data only, I tried using ProcessAdd but it returned the error attached below suggesting that there is a duplicate and I can't understand what's the problem exactly and how to solve it.

Additionaly, if there is any way to process new data and updated data only please suggest it because the solutions that I found are only related to multidimensional model.

[amitchandak]

@SpikeSpiegel_3 , Because of the current query, it is getting duplicates for the order id column, which is a primary key column on one side table.

Please load it separately in a file and check for any duplicates first

[SpikeSpiegel_3]

I checked several times and found no duplicates, but it's still returning the same error. Is there any solution ?