Namespace Definition is already locked in change list Standard Change List

Hi Experts,

I am facing the problem while creation of namespace under SCV. Iam getting the below error.

" Namespace Definition is already locked in change list Standard Change List by user gunnalab If necessary, you can reassign the

other users change list to yourself ".

Gunnala user already left the company and i am unable to create the namespace.

Can anyone suggest where the settings has be done and from where i can remove the lock.

Thanks,

Bahskar