diff --git a/crm/api/doc.py b/crm/api/doc.py
index 4f5d71c9..f1fef5cc 100644
--- a/crm/api/doc.py
+++ b/crm/api/doc.py
@@ -30,6 +30,11 @@ def get_filterable_fields(doctype: str):
 		"Text",
 	]
 
+	c = get_controller(doctype)
+	restricted_fields = []
+	if hasattr(c, "get_non_filterable_fields"):
+		restricted_fields = c.get_non_filterable_fields()
+
 	from_doc_fields = (
 		frappe.qb.from_(DocField)
 		.select(
@@ -42,6 +47,7 @@ def get_filterable_fields(doctype: str):
 		.where(DocField.parent == doctype)
 		.where(DocField.hidden == False)
 		.where(Criterion.any([DocField.fieldtype == i for i in allowed_fieldtypes]))
+		.where(Criterion.all([DocField.fieldname != i for i in restricted_fields]))
 		.run(as_dict=True)
 	)
 	res = []
diff --git a/crm/fcrm/doctype/crm_lead/crm_lead.py b/crm/fcrm/doctype/crm_lead/crm_lead.py
index 94f9c824..d21fdaa6 100644
--- a/crm/fcrm/doctype/crm_lead/crm_lead.py
+++ b/crm/fcrm/doctype/crm_lead/crm_lead.py
@@ -196,6 +196,10 @@ class CRMLead(Document):
 			{ "label": 'Mobile no', "value": 'mobile_no' },
 		]
 
+	@staticmethod
+	def get_non_filterable_fields():
+		return ["converted"]
+
 	@staticmethod
 	def default_list_data():
 		columns = [