diff --git a/erpnext/accounts/doctype/payment_request/payment_request.py b/erpnext/accounts/doctype/payment_request/payment_request.py
index 4f6205a2445..8cb9eb6b5d9 100644
--- a/erpnext/accounts/doctype/payment_request/payment_request.py
+++ b/erpnext/accounts/doctype/payment_request/payment_request.py
@@ -127,6 +127,8 @@ class PaymentRequest(Document):
 		ref_doc = frappe.get_doc(self.reference_doctype, self.reference_name)
 		if not hasattr(ref_doc, "order_type") or ref_doc.order_type != "Shopping Cart":
 			ref_amount = get_amount(ref_doc, self.payment_account)
+			if not ref_amount:
+				frappe.throw(_("Payment Entry is already created"))
 
 			if existing_payment_request_amount + flt(self.grand_total) > ref_amount:
 				frappe.throw(
@@ -544,6 +546,8 @@ def make_payment_request(**args):
 	gateway_account = get_gateway_details(args) or frappe._dict()
 
 	grand_total = get_amount(ref_doc, gateway_account.get("payment_account"))
+	if not grand_total:
+		frappe.throw(_("Payment Entry is already created"))
 	if args.loyalty_points and args.dt == "Sales Order":
 		from erpnext.accounts.doctype.loyalty_program.loyalty_program import validate_loyalty_points
 
diff --git a/erpnext/templates/pages/order.html b/erpnext/templates/pages/order.html
index 315478fc649..0805a32ae33 100644
--- a/erpnext/templates/pages/order.html
+++ b/erpnext/templates/pages/order.html
@@ -40,7 +40,7 @@
 					<p>
 						<a href="/api/method/erpnext.accounts.doctype.payment_request.payment_request.make_payment_request?dn={{ doc.name }}&dt={{ doc.doctype }}&submit_doc=1&order_type=Shopping Cart"
 							class="btn btn-primary btn-sm" id="pay-for-order">
-							{{ _("Pay", null, "Amount") }} {{doc.get_formatted("grand_total") }}
+							{{ _("Pay", null, "Amount") }} {{ pay_amount }}
 						</a>
 					</p>
 				</div>
diff --git a/erpnext/templates/pages/order.py b/erpnext/templates/pages/order.py
index dca5a0c7497..dcf3b046722 100644
--- a/erpnext/templates/pages/order.py
+++ b/erpnext/templates/pages/order.py
@@ -6,6 +6,7 @@ from frappe import _
 
 from erpnext.accounts.doctype.payment_request.payment_request import (
 	ALLOWED_DOCTYPES_FOR_PAYMENT_REQUEST,
+	get_amount,
 )
 
 
@@ -50,11 +51,7 @@ def get_context(context):
 			)
 			context.available_loyalty_points = int(loyalty_program_details.get("loyalty_points"))
 
-	context.show_pay_button = (
-		"payments" in frappe.get_installed_apps()
-		and frappe.db.get_single_value("Buying Settings", "show_pay_button")
-		and context.doc.doctype in ALLOWED_DOCTYPES_FOR_PAYMENT_REQUEST
-	)
+	context.show_pay_button, context.pay_amount = get_payment_details(context.doc)
 	context.show_make_pi_button = False
 	if context.doc.get("supplier"):
 		# show Make Purchase Invoice button based on permission
@@ -67,3 +64,19 @@ def get_attachments(dt, dn):
 		fields=["name", "file_name", "file_url", "is_private"],
 		filters={"attached_to_name": dn, "attached_to_doctype": dt, "is_private": 0},
 	)
+
+
+def get_payment_details(doc):
+	show_pay_button, amount = (
+		(
+			"payments" in frappe.get_installed_apps()
+			and frappe.db.get_single_value("Buying Settings", "show_pay_button")
+			and doc.doctype in ALLOWED_DOCTYPES_FOR_PAYMENT_REQUEST
+		),
+		0,
+	)
+	if not show_pay_button:
+		return show_pay_button, amount
+
+	amount = get_amount(doc)
+	return bool(amount), amount