diff --git a/frappe/cache_manager.py b/frappe/cache_manager.py
index eeddef1865..9c9f081c60 100644
--- a/frappe/cache_manager.py
+++ b/frappe/cache_manager.py
@@ -160,11 +160,10 @@ def clear_doctype_cache(doctype=None):
 
 def clear_controller_cache(doctype=None):
 	if not doctype:
-		del frappe.controllers
-		frappe.controllers = {}
+		frappe.controllers.pop(frappe.local.site, None)
 		return
 
-	for site_controllers in frappe.controllers.values():
+	if site_controllers := frappe.controllers.get(frappe.local.site):
 		site_controllers.pop(doctype, None)