refactor: allow '0' rounding allowance
diff --git a/erpnext/accounts/doctype/exchange_rate_revaluation/exchange_rate_revaluation.js b/erpnext/accounts/doctype/exchange_rate_revaluation/exchange_rate_revaluation.js
index f51b90d..1ef5c83 100644
--- a/erpnext/accounts/doctype/exchange_rate_revaluation/exchange_rate_revaluation.js
+++ b/erpnext/accounts/doctype/exchange_rate_revaluation/exchange_rate_revaluation.js
@@ -37,7 +37,7 @@
 
 	validate_rounding_loss: function(frm) {
 		let allowance = frm.doc.rounding_loss_allowance;
-		if (!(allowance > 0 && allowance < 1)) {
+		if (!(allowance >= 0 && allowance < 1)) {
 			frappe.throw(__("Rounding Loss Allowance should be between 0 and 1"));
 		}
 	},
diff --git a/erpnext/accounts/doctype/exchange_rate_revaluation/exchange_rate_revaluation.py b/erpnext/accounts/doctype/exchange_rate_revaluation/exchange_rate_revaluation.py
index 4926006..598db64 100644
--- a/erpnext/accounts/doctype/exchange_rate_revaluation/exchange_rate_revaluation.py
+++ b/erpnext/accounts/doctype/exchange_rate_revaluation/exchange_rate_revaluation.py
@@ -22,7 +22,7 @@
 		self.set_total_gain_loss()
 
 	def validate_rounding_loss_allowance(self):
-		if not (self.rounding_loss_allowance > 0 and self.rounding_loss_allowance < 1):
+		if not (self.rounding_loss_allowance >= 0 and self.rounding_loss_allowance < 1):
 			frappe.throw(_("Rounding Loss Allowance should be between 0 and 1"))
 
 	def set_total_gain_loss(self):