diff --git a/frappe/core/doctype/file/file.py b/frappe/core/doctype/file/file.py
index 34b8a606dd..16254da4cc 100755
--- a/frappe/core/doctype/file/file.py
+++ b/frappe/core/doctype/file/file.py
@@ -14,6 +14,7 @@ from requests.exceptions import HTTPError, SSLError
 
 import frappe
 from frappe import _
+from frappe.database.schema import SPECIAL_CHAR_PATTERN
 from frappe.model.document import Document
 from frappe.utils import call_hook_method, cint, get_files_path, get_hook_method, get_url
 from frappe.utils.file_manager import is_safe_path
@@ -104,10 +105,7 @@ class File(Document):
 		if not self.attached_to_name or not isinstance(self.attached_to_name, (str, int)):
 			frappe.throw(_("Attached To Name must be a string or an integer"), frappe.ValidationError)
 
-		if not self.attached_to_field:
-			return
-
-		if not frappe.get_meta(self.attached_to_doctype).has_field(self.attached_to_field):
+		if self.attached_to_field and SPECIAL_CHAR_PATTERN.search(self.attached_to_field):
 			frappe.throw(_("The fieldname you've specified in Attached To Field is invalid"))
 
 	def after_rename(self, *args, **kwargs):
diff --git a/frappe/public/js/frappe/form/controls/attach.js b/frappe/public/js/frappe/form/controls/attach.js
index 0f40a0a829..fc8aef72b8 100644
--- a/frappe/public/js/frappe/form/controls/attach.js
+++ b/frappe/public/js/frappe/form/controls/attach.js
@@ -79,7 +79,7 @@ frappe.ui.form.ControlAttach = class ControlAttach extends frappe.ui.form.Contro
 		if (this.frm) {
 			options.doctype = this.frm.doctype;
 			options.docname = this.frm.docname;
-			options.fieldname = this.grid ? this.grid.df.fieldname : this.df.fieldname;
+			options.fieldname = this.df.fieldname;
 			options.make_attachments_public = this.frm.meta.make_attachments_public;
 		}