Troubleshoot a system error on Joomla 3/Mijoshop

There is an issue within Mijoshop (opencart integrated for Joomla) where customers are seeing other customer order in their purchase history. It looks like some orders aren't creating new transaction ID's the Error log is showing some orders there is a validation error with Paypal but the order goes through but then this problem arises. It is likely we have a few more things to do after this project so someone competent in this area would be good to deal with.

Joomla PHP

ID Proiect: #14235519

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