diff --git a/erpnext/regional/doctype/lower_deduction_certificate/lower_deduction_certificate.py b/erpnext/regional/doctype/lower_deduction_certificate/lower_deduction_certificate.py
index cc223e9..6ae04c1 100644
--- a/erpnext/regional/doctype/lower_deduction_certificate/lower_deduction_certificate.py
+++ b/erpnext/regional/doctype/lower_deduction_certificate/lower_deduction_certificate.py
@@ -34,6 +34,7 @@
 				"supplier": self.supplier,
 				"tax_withholding_category": self.tax_withholding_category,
 				"name": ("!=", self.name),
+				"company": self.company,
 			},
 			["name", "valid_from", "valid_upto"],
 			as_dict=True,