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I am using Magento 2.3.1 multiple website store and I am using PayPal express checkout in my payment method. I have to use the sandbox credentials for a PayPal business account. I place one order and in checkout, I select PayPal express method but after it goes to the redirect page, I am getting an error.

The Paypal gateway rejected the request. Payment has already been made for this InvoiceID (# 10412: Duplicate invoice).

I tried to find out solutions for this but I am not getting anywehere. If anyone has any ideas let me know.

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