In the DDS, you can unbind an instance from the bound tag key value.
Open the DDS console page.
Click Management Center -> Instance Management on the left to go to the instance list page.
In the Tag operation column of the instance list, click the Tag icon. In the list of bound tags that is displayed, click the X icon. For some resource pools, you can directly click the X icon in the Tag column. In the dialog box that is displayed, click OK. The instance is unbound from the tag.