Not able to activate workflow

Hi All,

One of our customer face the issue while Activate the custom workflow.

We have one managed solution, in that their is one custom workflow on account entity. So whenever user try to activate this workflow he got following error:

The Workflow (Id=906a2fab-ee03-4f41-9a06-97159188b896) entity or component has attempted to transition from an invalid state: ComponentStateName: Solution; ComponentOperation: Update; ComponentSolutionType: Solution; SolutionOperationContext: None; IsProtected: True; FinalComponentState: Publish.

Anyone have any idea regarding this issue ? 

Thanks in advance.