Rename the current TaskDefinition to include a time stamp. For example, to modify the Create User workflow, rename the TaskDefinition from Create User to Create User 20080701. You can rename a workflow TaskDefinition with the Sun Java System Identity Manager IDE.
Save and import the edited workflow.
Following this procedure will help prevent problems with existing Create User tasks that may be in a suspended state within Identity Manager. This allows the TaskDefinition to keep its unique ID, which is referenced inside suspended tasks.