diff --git a/frappe/public/js/frappe/views/treeview.js b/frappe/public/js/frappe/views/treeview.js
index 0096a333bd..c255bca9dc 100644
--- a/frappe/public/js/frappe/views/treeview.js
+++ b/frappe/public/js/frappe/views/treeview.js
@@ -235,7 +235,6 @@ frappe.views.TreeView = class TreeView {
 			method: "frappe.utils.nestedset.rebuild_tree",
 			args: {
 				doctype: me.doctype,
-				parent_field: "parent_" + me.doctype.toLowerCase().replace(/ /g, "_"),
 			},
 			callback: function (r) {
 				if (!r.exc) {
diff --git a/frappe/utils/nestedset.py b/frappe/utils/nestedset.py
index 2beaa63447..59f68d7afc 100644
--- a/frappe/utils/nestedset.py
+++ b/frappe/utils/nestedset.py
@@ -168,9 +168,10 @@ def update_move_node(doc: Document, parent_field: str):
 
 
 @frappe.whitelist()
-def rebuild_tree(doctype, parent_field):
-	"""
-	call rebuild_node for all root nodes
+def rebuild_tree(doctype, parent_field=None):
+	"""Call rebuild_node for all root nodes.
+
+	The `parent_field` parameter is ignored and will be removed in v16+ (kept for backward compatibility).
 	"""
 
 	# Check for perm if called from client-side
@@ -184,6 +185,8 @@ def rebuild_tree(doctype, parent_field):
 			title=_("Invalid Action"),
 		)
 
+	parent_field = meta.nsm_parent_field or f"parent_{frappe.scrub(doctype)}"
+
 	# get all roots
 	right = 1
 	table = DocType(doctype)