diff --git a/erpnext/stock/doctype/item/item.json b/erpnext/stock/doctype/item/item.json
index 76cb31dc42e..247140b657e 100644
--- a/erpnext/stock/doctype/item/item.json
+++ b/erpnext/stock/doctype/item/item.json
@@ -795,7 +795,7 @@
   },
   {
    "fieldname": "customer_code",
-   "fieldtype": "Data",
+   "fieldtype": "Small Text",
    "hidden": 1,
    "label": "Customer Code",
    "no_copy": 1,
@@ -910,7 +910,7 @@
  "image_field": "image",
  "index_web_pages_for_search": 1,
  "links": [],
- "modified": "2022-06-15 09:02:06.177691",
+ "modified": "2022-09-12 15:00:10.130340",
  "modified_by": "Administrator",
  "module": "Stock",
  "name": "Item",
diff --git a/erpnext/stock/doctype/item/test_item.py b/erpnext/stock/doctype/item/test_item.py
index 3366c737cbd..89da72195fc 100644
--- a/erpnext/stock/doctype/item/test_item.py
+++ b/erpnext/stock/doctype/item/test_item.py
@@ -778,6 +778,14 @@ class TestItem(FrappeTestCase):
 			item.has_batch_no = 1
 			item.save()
 
+	def test_customer_codes_length(self):
+		"""Check if item code with special characters are allowed."""
+		item = make_item(properties={"item_code": "Test Item Code With Special Characters"})
+		for row in range(3):
+			item.append("customer_items", {"ref_code": frappe.generate_hash("", 120)})
+		item.save()
+		self.assertTrue(len(item.customer_code) > 140)
+
 
 def set_item_variant_settings(fields):
 	doc = frappe.get_doc("Item Variant Settings")