From 2e0db2d69e2cde6b428c7a7cfb62c23e7780598d Mon Sep 17 00:00:00 2001
From: Ejaaz Khan <ejaaz@frappe.io>
Date: Fri, 25 Apr 2025 14:51:16 +0530
Subject: [PATCH] fix: Module not found error for custom doctypes

---
 frappe/desk/form/linked_with.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/frappe/desk/form/linked_with.py b/frappe/desk/form/linked_with.py
index cb1169276f..0c58b325a2 100644
--- a/frappe/desk/form/linked_with.py
+++ b/frappe/desk/form/linked_with.py
@@ -564,7 +564,16 @@ def _get_linked_doctypes(doctype, without_ignore_user_permissions_enabled=False)
 			continue
 		ret[dt] = {"get_parent": True}
 
+	custom_doctypes = frappe.get_all(
+		doctype="DocType", filters=[["custom", "=", 1], ["name", "in", list(ret.keys())]], as_list=True
+	)
+
+	custom_doctypes = [item[0] for item in custom_doctypes]
+
 	for dt in list(ret):
+		# if the custom checkbox is checked, then don't load the module of the DocType because it doesn't belong to any app.
+		if dt in custom_doctypes:
+			continue
 		try:
 			doctype_module = load_doctype_module(dt)
 		except (ImportError, KeyError):