Created one backup jobs, but with two same backup jobs created.

Creating backup jobs occasionally creates two same backup jobs, with the second job having no virtual machine list.

Concurrency issue during job creation, sometimes frontend submitting duplicate requests causing task created twice.

If your current version is lower than SP2, please try the below temporary solution

• Delete Duplicate Job 

   - Go to "Monitor Center" > "Jobs">"Current Jobs" , find duplicate jobs.

   - Clicking job name, click "VM list" to find the job without vm lists.

   - Delete the job without VM list

• Upgrade vinchin to the latest version to fundamentally resolves this issue.