The Atlassian Community Forums are currently in read-only mode. We will be relaunching on a new platform on September 22 (read more here). We apologize for the extended downtime. For concerns or questions, please email communitymanagers@atlassian.com. See you on the other side, on the new Atlassian Community Forums! :)
You should be able to move back to the original status by moving through the transition in the workflow. Only if the workflow allows it. If it does not, then the workflow must be change by the admin to allow this.
Here's the Atlassian documentation about transitioning:
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.