fix(api): clear all draft variables after importing dsl

api/services/app_dsl_service.py

@@ -32,6 +32,7 @@ from models import Account, App, AppMode
 from models.model import AppModelConfig
 from models.workflow import Workflow
 from services.plugin.dependencies_analysis import DependenciesAnalysisService
+from services.workflow_draft_variable_service import WorkflowDraftVariableService
 from services.workflow_service import WorkflowService
 
 logger = logging.getLogger(__name__)
@@ -292,6 +293,8 @@ class AppDslService:
                 dependencies=check_dependencies_pending_data,
             )
 
+            draft_var_srv = WorkflowDraftVariableService(session=self._session)
+            draft_var_srv.delete_workflow_variables(app_id=app.id)
             return Import(
                 id=import_id,
                 status=status,