diff --git a/erpnext/accounts/doctype/opening_invoice_creation_tool_item/opening_invoice_creation_tool_item.json b/erpnext/accounts/doctype/opening_invoice_creation_tool_item/opening_invoice_creation_tool_item.json
index 4ce8cb95b18..07c78631358 100644
--- a/erpnext/accounts/doctype/opening_invoice_creation_tool_item/opening_invoice_creation_tool_item.json
+++ b/erpnext/accounts/doctype/opening_invoice_creation_tool_item/opening_invoice_creation_tool_item.json
@@ -103,10 +103,18 @@
   {
    "fieldname": "dimension_col_break",
    "fieldtype": "Column Break"
+  },
+  {
+   "description": "Reference number of the invoice from the previous system",
+   "fieldname": "invoice_number",
+   "fieldtype": "Data",
+   "in_list_view": 1,
+   "label": "Invoice Number"
   }
  ],
  "istable": 1,
- "modified": "2019-07-25 15:00:00.460695",
+ "links": [],
+ "modified": "2021-12-17 19:25:06.053187",
  "modified_by": "Administrator",
  "module": "Accounts",
  "name": "Opening Invoice Creation Tool Item",
@@ -116,4 +124,4 @@
  "sort_field": "modified",
  "sort_order": "DESC",
  "track_changes": 1
-}
\ No newline at end of file
+}
diff --git a/erpnext/public/js/utils.js b/erpnext/public/js/utils.js
index 7840c58d891..ee74f351d17 100755
--- a/erpnext/public/js/utils.js
+++ b/erpnext/public/js/utils.js
@@ -430,12 +430,9 @@ erpnext.utils.select_alternate_items = function(opts) {
 					qty = row.qty;
 				}
 				row[item_field] = d.alternate_item;
-				frm.script_manager.trigger(item_field, row.doctype, row.name)
-					.then(() => {
-						frappe.model.set_value(row.doctype, row.name, 'qty', qty);
-						frappe.model.set_value(row.doctype, row.name,
-							opts.original_item_field, d.item_code);
-					});
+				frappe.model.set_value(row.doctype, row.name, 'qty', qty);
+				frappe.model.set_value(row.doctype, row.name, opts.original_item_field, d.item_code);
+				frm.trigger(item_field, row.doctype, row.name);
 			});
 
 			refresh_field(opts.child_docname);
diff --git a/erpnext/stock/stock_ledger.py b/erpnext/stock/stock_ledger.py
index d2e840faf02..90c6ae67fb3 100644
--- a/erpnext/stock/stock_ledger.py
+++ b/erpnext/stock/stock_ledger.py
@@ -1157,7 +1157,7 @@ def _round_off_if_near_zero(number: float, precision: int = 6) -> float:
 	""" Rounds off the number to zero only if number is close to zero for decimal
 		specified in precision. Precision defaults to 6.
 	"""
-	if flt(number) < (1.0 / (10**precision)):
-		return 0
+	if abs(0.0 - flt(number)) < (1.0 / (10**precision)):
+		return 0.0
 
 	return flt(number)