fix: new bom version should not recalculate operations through routing (backport #55370) (#55371)

Co-authored-by: Mihir Kandoi <kandoimihir@gmail.com>
fix: new bom version should not recalculate operations through routing (#55370)

erpnext/manufacturing/doctype/bom/bom.js

@@ -438,7 +438,7 @@ frappe.ui.form.on("BOM", {
 	},
 
 	routing(frm) {
-		if (frm.doc.routing) {
+		if (frm.doc.routing && frm.doc.with_operations && !frm.doc.operations) {
 			frappe.call({
 				doc: frm.doc,
 				method: "get_routing",