How to remove or delete article

How to remove or delete article?

Dear sir,

We have upload the back issue with xml. By mistake it will uploaded two time. Now I want to delete the duplicate article but there is no option to remove or delete this type of article.
Article which are uploaded through xml, only showing production and in unassigned group it nor can be reviewed or delete. Do the needful in this.
Waiting for your reply.

HI @National_Journal_of ,

Could you kindly confirm which version of OJS you are currently using?

Kind Regards,
Patricia

Thank you for your quick response.
We are currently using OJS 3.3 version.

Kindly guide in this case. we want to delete the duplicate file uploaded by mistake.