diff --git a/erpnext/venue/doctype/event_registration/event_registration.py b/erpnext/venue/doctype/event_registration/event_registration.py
index 5f83f0acaeb7aa488cf4e0271ba801e72602c88e..0b4525b33f90fb673734bae7c9f5e1e2213a6df9 100644
--- a/erpnext/venue/doctype/event_registration/event_registration.py
+++ b/erpnext/venue/doctype/event_registration/event_registration.py
@@ -6,7 +6,7 @@ from functools import cached_property
 import frappe
 from frappe import _
 from frappe.model.document import Document
-from frappe.utils import is_desk
+from frappe.utils import cint, is_desk
 
 from erpnext.utilities import webshop_app_import_guard
 
@@ -90,7 +90,7 @@ class EventRegistration(Document):
 		return frappe.get_doc("Event", self.event)
 
 	def validate(self):
-		if self.qty < 1:
+		if cint(self.qty) < 1:
 			self.qty = 1
 
 		self.validate_duplicates()
@@ -125,9 +125,13 @@ class EventRegistration(Document):
 		):
 			DuplicateRegistrationEmail.throw(self)
 
-		if self.user and frappe.db.exists(
-			"Event Registration",
-			{"user": self.user, **base_filters},
+		if (
+			self.user
+			and self.user != "Guest"
+			and frappe.db.exists(
+				"Event Registration",
+				{"user": self.user, **base_filters},
+			)
 		):
 			DuplicateRegistration.throw(self)
 
@@ -239,6 +243,7 @@ class EventRegistration(Document):
 			self.make_payment_entry(
 				reference_no=reference_no, payment_gateway=self.payment_gateway, invoice_doc=invoice
 			)
+			frappe.db.commit()
 		elif new_status in ("Failed", "Cancelled"):
 			self.set("payment_status", new_status)
 			self.cancel()
@@ -249,8 +254,9 @@ class EventRegistration(Document):
 
 	def on_webform_save(self, webform):
 		# The document is created from the Web Form, it means that someone wants to register
-		self.user = self.user or frappe.session.user
-		self.set_company_from_cart_settings()
+		self.user = self.user or (frappe.session.user if frappe.session.user != "Guest" else None)
+		if not self.company:
+			self.set_company_from_cart_settings()
 
 		if not self.flags.in_payment_webform:
 			# Free registration