SAP Message WL395 - Workflow customizing incomplete: Default workflow administrator missing

Procedure
Complete the entries in workflow customizing andspecify a standard system administrator for workflow. This will be usedfor all workflow definitions for which a system administrator forworkflow has not been defined.
If the workflow system administrator from the workflow definition isnot to be responsible for this workflow execution, you can specifyanother system administrator under the name _WF_ADMINISTRATOR inthe workflow container. The definition default is then overwritten.
Once you have defined a system administrator for workflow and enteredit in the workflow container of the workflow with the error, you cancontinue the suspended workflow.