prevent duplicates in request item variables(flow designer)

[SimãoG]

First step: My trigger is the service catalog 

Action: Get catalog variables

Third step: A for each flow logic to retrieve my multi row variables.

The scenarios is that i don't want duplicate records in a specific tables where the variables are. 

So i created a custom action scripted with the variables as inputs and their values as outputs. i tested it but it's not working the i already have a BR to avoid duplication but we need the flow as well 

[Akash4]

Can you share the script logic, to debug futher!

sometimes same code as BR may not work due to syntax differences

[Antoni Zahariev]

The easiest way to avoid "duplicate records in a specific tables where the variables are" is to create the logic (i.e. Business Rules) that will not allow duplicate records to be inserted at these specific tables.