Hi @Jas ,
If I understand correctly you need to build the previous month's partition and also refresh the data from N-2, N-3, and all previous partitions to remain untouched.
To build the previous month you can use a Scenario build step with PREVIOUS_MONTH as the partition.
Given your data is partitioned by date, is there a real need to rebuild the previous partitions, e.g 2 months ago, 3 months ago?
If you do need you can create 2 scenario variables e.g
Then use the variable name to build the respective partitions.
Let me know this helps or if you have any additional questions.