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 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 Waveset. This allows the TaskDefinition to keep its unique ID, which is referenced inside suspended tasks.