Automatically turn Quickbooks invoices into Monday.com items, using Make Data Stores to avoid duplicates

I have burned through my 1,000 free operations by attempting initial setup, so I’m asking for help! I can successfully have Monday.com items created with the relevant columns mapped out from the QB Invoice, but I end up with duplicates. I asked the Make AI for help and in spite of some inaccurate advice, it did manage to explain to me that Data Stores can be used to cross-reference existing records prior to sending them off to Monday.com. I am able to have records added to my Data Store, but I have been unable to prevent duplicates, which I have attempted using both the “Search Records” Data Store module (which allows fields other than Key to be used, which is good because even duplicates receive unique Keys) and the “Check the existence of a record” Data Store module (which only uses the key, which hence cannot be used since keys are still assigned to duplicates”.

I continually get errors, including the following:

1:37 PM
Cannot initialize the scenario because of the reason ‘Scenario validation failed - 1 problem(s) found.’
1:37 PM

  • Invalid reference in filter ‘0-0’ on link before module ‘3’: Variable ‘7.exist’ references not existing module ‘7’.
    1:37 PM
    Scenario initialization failed with an error.

Screenshot is below, any help would be greatly appreciated! Been hitting my head on this issue for hours and now I’ve run out of operations bandwidth to keep troubleshooting… Thank you <3