Originally Posted by
websmith
I will answer best I can, but let me clarify the sequence of events. The sites were recently upgraded to Zen Cart 1.5.7 and PHP 7.4. One of the problems noted (that had been present since 7.2 PHP but not addressed) was that a php error was generated when PayPal was refunded using the standard module. DrByte provide a fix which was incorporated into the ipn_main_handler.php this update resolved the issue on the refunds, but now I am seeing this second issue. Since it was a change it is suspect that it is related to the new problem.
Your second question I am not sure how to answer this is the first I have seen of this change and although I read everything I could find with all the merging I did not find anything that stated what the problem was was in terms I understood. This change has not been made and until I understand what error it creates I would be hesitant to apply it.
The logs referred in the previous poste was debug logs that appear in the Logs folder, but mention of logs reminded me there are IPN logs which also show 2 entries for the orders with the duplicated invoices. The PayPal module itself does not have logging enabled since it is a live site.
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