diff --git a/erpnext/accounts/doctype/tax_withholding_category/tax_withholding_category.py b/erpnext/accounts/doctype/tax_withholding_category/tax_withholding_category.py
index c871af9..06b8df1 100644
--- a/erpnext/accounts/doctype/tax_withholding_category/tax_withholding_category.py
+++ b/erpnext/accounts/doctype/tax_withholding_category/tax_withholding_category.py
@@ -21,7 +21,7 @@
 				frappe.throw(_("Row #{0}: From Date cannot be before To Date").format(d.idx))
 
 			# validate overlapping of dates
-			if last_date and getdate(r.to_date) < getdate(last_date):
+			if last_date and getdate(d.to_date) < getdate(last_date):
 				frappe.throw(_("Row #{0}: Dates overlapping with other row").format(d.idx))
 
 	def validate_thresholds(self):
diff --git a/erpnext/patches/v13_0/update_dates_in_tax_withholding_category.py b/erpnext/patches/v13_0/update_dates_in_tax_withholding_category.py
index 2563d8a..33c4942 100644
--- a/erpnext/patches/v13_0/update_dates_in_tax_withholding_category.py
+++ b/erpnext/patches/v13_0/update_dates_in_tax_withholding_category.py
@@ -6,17 +6,19 @@
 
 def execute():
 	frappe.reload_doc('accounts', 'doctype', 'Tax Withholding Rate')
-	tds_category_rates = frappe.get_all('Tax Withholding Rate', fields=['name', 'fiscal_year'])
 
-	fiscal_year_map = {}
-	for rate in tds_category_rates:
-		if not fiscal_year_map.get(rate.fiscal_year):
-			fiscal_year_map[rate.fiscal_year] = get_fiscal_year(fiscal_year=rate.fiscal_year)
+	if frappe.db.has_column('Tax Withholding Rate', 'fiscal_year'):
+		tds_category_rates = frappe.get_all('Tax Withholding Rate', fields=['name', 'fiscal_year'])
 
-		from_date = fiscal_year_map.get(rate.fiscal_year)[1]
-		to_date = fiscal_year_map.get(rate.fiscal_year)[2]
+		fiscal_year_map = {}
+		for rate in tds_category_rates:
+			if not fiscal_year_map.get(rate.fiscal_year):
+				fiscal_year_map[rate.fiscal_year] = get_fiscal_year(fiscal_year=rate.fiscal_year)
 
-		frappe.db.set_value('Tax Withholding Rate', rate.name, {
-			'from_date': from_date,
-			'to_date': to_date
-		})
\ No newline at end of file
+			from_date = fiscal_year_map.get(rate.fiscal_year)[1]
+			to_date = fiscal_year_map.get(rate.fiscal_year)[2]
+
+			frappe.db.set_value('Tax Withholding Rate', rate.name, {
+				'from_date': from_date,
+				'to_date': to_date
+			})
\ No newline at end of file