Update payment_request.py
diff --git a/erpnext/accounts/doctype/payment_request/payment_request.py b/erpnext/accounts/doctype/payment_request/payment_request.py
index 1fbde75..64c4124 100644
--- a/erpnext/accounts/doctype/payment_request/payment_request.py
+++ b/erpnext/accounts/doctype/payment_request/payment_request.py
@@ -214,11 +214,10 @@
 
 	def check_if_payment_entry_exists(self):
 		if self.status == "Paid":
-			payment_entry = frappe.get_all("Payment Entry Reference",
+			if frappe.get_all("Payment Entry Reference",
 				filters={"reference_name": self.reference_name, "docstatus": ["<", 2]},
-				fields=["distinct(parent)"])
-
-			if any(payment_entry):
+				fields=["parent"],
+				limit=1):
 				frappe.throw(_("Payment Entry already exists"), title=_('Error'))
 
 	def make_communication_entry(self):