diff --git a/erpnext/manufacturing/doctype/bom/bom.py b/erpnext/manufacturing/doctype/bom/bom.py
index 2717da14826..3da64ef08e8 100644
--- a/erpnext/manufacturing/doctype/bom/bom.py
+++ b/erpnext/manufacturing/doctype/bom/bom.py
@@ -346,6 +346,19 @@ class BOM(WebsiteGenerator):
 
 		fg_items = []
 		for row in self.operations:
+			if row.bom_no and not row.finished_good:
+				row.finished_good = frappe.get_cached_value("BOM", row.bom_no, "item")
+
+			if row.is_final_finished_good and not row.finished_good:
+				row.finished_good = self.item
+
+			if not row.finished_good:
+				frappe.throw(
+					_(
+						"Row #{0}: FG / Semi FG Item is required for the operation {1} as 'Track Semi Finished Goods' is enabled."
+					).format(row.idx, bold(row.operation)),
+				)
+
 			if not row.is_final_finished_good:
 				continue
 
diff --git a/erpnext/manufacturing/doctype/bom_operation/bom_operation.json b/erpnext/manufacturing/doctype/bom_operation/bom_operation.json
index 86fcd7082fd..e6ac3ee474e 100644
--- a/erpnext/manufacturing/doctype/bom_operation/bom_operation.json
+++ b/erpnext/manufacturing/doctype/bom_operation/bom_operation.json
@@ -213,6 +213,7 @@
    "fieldtype": "Link",
    "in_list_view": 1,
    "label": "FG / Semi FG Item",
+   "mandatory_depends_on": "eval:parent.track_semi_finished_goods === 1",
    "options": "Item"
   },
   {
@@ -307,7 +308,7 @@
  "index_web_pages_for_search": 1,
  "istable": 1,
  "links": [],
- "modified": "2026-05-25 17:15:42.044630",
+ "modified": "2026-08-08 12:00:00.000000",
  "modified_by": "Administrator",
  "module": "Manufacturing",
  "name": "BOM Operation",