diff --git a/tacker/nfvo/drivers/vim/openstack_driver.py b/tacker/nfvo/drivers/vim/openstack_driver.py
index 4f088ec2d..fb050e822 100644
--- a/tacker/nfvo/drivers/vim/openstack_driver.py
+++ b/tacker/nfvo/drivers/vim/openstack_driver.py
@@ -762,7 +762,7 @@ class OpenStack_Driver(abstract_vim_driver.VimAbstractDriver,
 
     def delete_execution(self, execution_id, auth_dict=None):
         return self.get_mistral_client(auth_dict).executions \
-            .delete(execution_id)
+            .delete(execution_id, force=True)
 
     def delete_workflow(self, workflow_id, auth_dict=None):
         return self.get_mistral_client(auth_dict) \
diff --git a/tacker/nfvo/workflows/vim_monitor/vim_monitor_utils.py b/tacker/nfvo/workflows/vim_monitor/vim_monitor_utils.py
index e55e30c9f..88d9ec1c4 100644
--- a/tacker/nfvo/workflows/vim_monitor/vim_monitor_utils.py
+++ b/tacker/nfvo/workflows/vim_monitor/vim_monitor_utils.py
@@ -52,7 +52,7 @@ def delete_executions(mistral_client, vim_id):
     executions = mistral_client.executions.list(
         workflow_name='vim_id_' + vim_id)
     for execution in executions:
-        mistral_client.executions.delete(execution.id)
+        mistral_client.executions.delete(execution.id, force=True)
 
 
 def delete_workflow(mistral_client, vim_id):