diff --git a/frappe/model/base_document.py b/frappe/model/base_document.py
index 43e88ffced..1b4b0090fc 100644
--- a/frappe/model/base_document.py
+++ b/frappe/model/base_document.py
@@ -364,7 +364,7 @@ class BaseDocument:
 		d = _dict()
 		field_values = self.__dict__
 
-		for fieldname in self.meta.get_valid_columns():
+		for fieldname in self.meta.get_valid_fields():
 			value = field_values.get(fieldname)
 
 			# if no need for sanitization and value is None, continue
diff --git a/frappe/model/meta.py b/frappe/model/meta.py
index 8464282058..01f3c91cc8 100644
--- a/frappe/model/meta.py
+++ b/frappe/model/meta.py
@@ -221,13 +221,28 @@ class Meta(Document):
 				self._valid_columns = get_table_columns(self.name)
 			else:
 				self._valid_columns = self.default_fields + [
-					df.fieldname for df in self.get("fields") if df.fieldtype in data_fieldtypes
+					df.fieldname
+					for df in self.get("fields")
+					if not df.get("is_virtual") and df.fieldtype in data_fieldtypes
 				]
 				if self.istable:
 					self._valid_columns += list(child_table_fields)
 
 		return self._valid_columns
 
+	def get_valid_fields(self) -> list[str]:
+		if not hasattr(self, "_valid_fields"):
+			if frappe.flags.in_install and self.name in self.special_doctypes:
+				self._valid_fields = get_table_columns(self.name)
+			else:
+				self._valid_fields = self.default_fields + [
+					df.fieldname for df in self.get("fields") if df.fieldtype in data_fieldtypes
+				]
+				if self.istable:
+					self._valid_fields += list(child_table_fields)
+
+		return self._valid_fields
+
 	def get_table_field_doctype(self, fieldname):
 		return TABLE_DOCTYPES_FOR_DOCTYPE.get(fieldname)