fix: use NestedGenericTabularInline for ChangeHistoryInline

ChangeHistoryInline was a plain GenericTabularInline but used inside
NestedModelAdmin views (WorkflowStageAdmin, etc.), causing
AttributeError on 'sortable_options'. Switch to
nested_admin.NestedGenericTabularInline for compatibility.

Author: matteius

CHANGELOG.md

@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.42.2] - 2026-03-31
+
+### Fixed
+- **WorkflowStage admin crash (`sortable_options`)** — `ChangeHistoryInline` used Django's `GenericTabularInline` but was included inside `NestedModelAdmin` views, causing `AttributeError: 'ChangeHistoryInline' object has no attribute 'sortable_options'`. Changed to `nested_admin.NestedGenericTabularInline` for compatibility.
+
 ## [0.42.1] - 2026-03-31
 
 ### Fixed

django_forms_workflows/admin.py

@@ -12,7 +12,6 @@
 from django.contrib import admin
 from django.contrib.auth.admin import GroupAdmin
 from django.contrib.auth.models import Group
-from django.contrib.contenttypes.admin import GenericTabularInline
 from django.db import transaction
 from django.http import HttpResponse, HttpResponseRedirect
 from django.shortcuts import render
@@ -53,7 +52,7 @@
 # ── Change History inline (read-only, for tracked models) ───────────────
 
 
-class ChangeHistoryInline(GenericTabularInline):
+class ChangeHistoryInline(nested_admin.NestedGenericTabularInline):
     model = ChangeHistory
     ct_field = "content_type"
     ct_fk_field = "object_id"

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "django-forms-workflows"
-version = "0.42.1"
+version = "0.42.2"
 description = "Enterprise-grade, database-driven form builder with approval workflows and external data integration"
 license = "LGPL-3.0-only"
 readme = "README.md"