Rejected invoice not initiating from AP Invoice Approval Workflow Concurrent Program

Hi All,

Once Approval notification reach to the use and if he/she rejects the approval request then i am not able to initiate the same request using AP Invoice Approval Workflow Concurrent Program, But there is a action button there i have initiate approval check box from there i can initiate but why i am able to submit the approval request from AP Invoice Approval Workflow Concurrent Program concurrent and first time i initiated the approval request using same concurrent.

Thanks