fix(discount-amount): Print hide discount_amount if print without amount (#15705)

diff --git a/erpnext/stock/doctype/delivery_note/delivery_note.js b/erpnext/stock/doctype/delivery_note/delivery_note.js
index 75e7590..daa8318 100644
--- a/erpnext/stock/doctype/delivery_note/delivery_note.js
+++ b/erpnext/stock/doctype/delivery_note/delivery_note.js
@@ -279,6 +279,7 @@
 		dn_item_fields['discount_percentage'].print_hide = 1;
 		dn_item_fields['price_list_rate'].print_hide = 1;
 		dn_item_fields['amount'].print_hide = 1;
+		dn_item_fields['discount_amount'].print_hide = 1;
 		dn_fields['taxes'].print_hide = 1;
 	} else {
 		if (dn_fields_copy['currency'].print_hide != 1)
@@ -287,6 +288,8 @@
 			dn_item_fields['rate'].print_hide = 0;
 		if (dn_item_fields_copy['amount'].print_hide != 1)
 			dn_item_fields['amount'].print_hide = 0;
+		if (dn_item_fields_copy['discount_amount'].print_hide != 1)
+			dn_item_fields['discount_amount'].print_hide = 0
 		if (dn_fields_copy['taxes'].print_hide != 1)
 			dn_fields['taxes'].print_hide = 0;
 	}
diff --git a/erpnext/stock/doctype/delivery_note/delivery_note.py b/erpnext/stock/doctype/delivery_note/delivery_note.py
index 6fec612..ab624d1 100644
--- a/erpnext/stock/doctype/delivery_note/delivery_note.py
+++ b/erpnext/stock/doctype/delivery_note/delivery_note.py
@@ -74,7 +74,7 @@
 		item_meta = frappe.get_meta("Delivery Note Item")
 		print_hide_fields = {
 			"parent": ["grand_total", "rounded_total", "in_words", "currency", "total", "taxes"],
-			"items": ["rate", "amount", "price_list_rate", "discount_percentage"]
+			"items": ["rate", "amount", "discount_amount", "price_list_rate", "discount_percentage"]
 		}
 
 		for key, fieldname in print_hide_fields.items():