After I remove volumes as previous post does, when I click the instance name my dashboard claims

Error: Unable to retrive details for instance xxxxx

In nova show output, I find something stange:

os-extended-volumes:volumes_attached  | [{"id": "111"}, {"id": "222"}]

The two volumes are the ones I removed last time and as a result the detail page gets error. Get into database and delete related records:

` [nova]> select id,instance_uuid,volume_id,deleted from nova.block_device_mapping where volume_id in (select id from cinder.volumes where deleted=1) and deleted=0; [nova]> delete from nova.block_device_mapping where volume_id in (select id from cinder.volumes where deleted=1) and deleted=0; `

After these action, the dashboard detail page can be accessed now.