stages/prompt: skip password equality check when previous checks failed

docs/flow/examples/recovery-email-verification.json

@@ -101,7 +101,7 @@
         {
             "identifiers": {
                 "pk": "975d5502-1e22-4d10-b560-fbc5bd70ff4d",
-                "name": "default-password-change-prompt"
+                "name": "Change your password"
             },
             "model": "passbook_stages_prompt.promptstage",
             "attrs": {

passbook/stages/password/migrations/0002_passwordstage_change_flow.py

@@ -27,7 +27,7 @@ def create_default_password_change(apps: Apps, schema_editor: BaseDatabaseSchema
     )
 
     prompt_stage, _ = PromptStage.objects.using(db_alias).update_or_create(
-        name="default-password-change-prompt",
+        name="Change your password",
     )
     password_prompt, _ = Prompt.objects.using(db_alias).update_or_create(
         field_key="password",

passbook/stages/prompt/forms.py

@@ -113,6 +113,8 @@ class PromptForm(forms.Form):
 
     def clean(self):
         cleaned_data = super().clean()
+        if cleaned_data == {}:
+            return {}
         # Check if we have two password fields, and make sure they are the same
         password_fields: QuerySet[Prompt] = self.stage.fields.filter(
             type=FieldTypes.PASSWORD
@@ -127,6 +129,7 @@ class PromptForm(forms.Form):
         result = engine.result
         if not result.passing:
             raise forms.ValidationError(list(result.messages))
+        return cleaned_data
 
 
 def username_field_cleaner_factory(field: Prompt) -> Callable: