SAP Message WL403 - Workflow '&': Workflow definition is not available

Diagnosis
The workflow &V1& was to be started. However, the version requiredcannot be found in the database:
Workflow task no. &V2&
Workflow definition no. &V3&, version &V4&.

Procedure
Check and correct, if necessary, the entries specified above. Thenre-start the workflow.