Rename Nintex workflow column

Hallo 

If i crate a worklow nintex create a column with the workflow name.

how can i rename a workflow column?

SharePoint crate a coulm with a strange name. I want rename it.

I want rename the coulm from "WF2Audit" to "WF_2_Auditbericht_freigegeben".

I already copyed the workflow and delete the old one. but still same name 😞

thanks

Markus