Method filterStatusGenerate does not exist

I have the following code in my PaymentService service:

public function findLastOrGenerateMerchantOrder(Enrollment $enrollment)
{
   $paymentsGenerate = $enrollment->payments->filterStatusGenerate();
   if ($paymentsGenerated && $paymentsGenerated->last()->isAvailable()) {
       $merchantOrder = $this->createMerchantOrder($enrollment);
   } else {
       throw new EnrollmentNotAvailable('No puedes realizar pago, concluyeron las fechas de vencimiento');
   }
   return $merchantOrder;
}

and in my Payment model I have the scope: 'scopeFilterStatusGenerate' what it does is bring me all the payments ($ paymentsGenerate) generated from a registration (Enrollment). The problem is that you are giving me the following error: "Method filterStatusGenerate does not exist."

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