Fixed #21968: Bad detection of old-style apps to add initial migration

        # Load the current graph state. Takes a connection, but it's not used

        # (makemigrations doesn't look at the database state).

        # Also make sure the graph is built without unmigrated apps shoehorned in.

        loader = MigrationLoader(connections[DEFAULT_DB_ALIAS])

        loader.build_graph(ignore_unmigrated=True)

        # Before anything else, see if there's conflicting apps and drop out

        # hard if there are any and they don't want to merge

        else:

            return self.disk_migrations[results[0]]

    def build_graph(self):

    def build_graph(self, ignore_unmigrated=False):

        """

        Builds a migration dependency graph using both the disk and database.

        You'll need to rebuild the graph if you apply migrations. This isn't

                # even have migrations.

                if parent[1] == "__first__" and parent not in self.graph:

                    if parent[0] in self.unmigrated_apps:

                        if ignore_unmigrated:

                            migration.dependencies.remove(parent)

                            parent = None

                        else:

                            # This app isn't migrated, but something depends on it.

                            # We'll add a fake initial migration for it into the

                            # graph.

                        parent = list(self.graph.root_nodes(parent[0]))[0]

                    else:

                        raise ValueError("Dependency on unknown app %s" % parent[0])

                if parent is not None:

                    self.graph.add_dependency(key, parent)

    def detect_conflicts(self):