Hi
Only the user who locked the page, or the “admin” user, can unlock it. Members of the administrators group, apart from the “admin” user, cannot unlock pages which were locked by other users.
"You can only unlock locked pages if you locked the page or if you have administrator privileges."Otherwise it is not possible.
Please have a look at this statement mentioned in documentation :
Link:- https://docs.adobe.com/content/docs/en/cq/5-6-1/wcm/page_publish.html#Locking%20Pages
UNLOCKING PAGES
You can only unlock locked pages if you locked the page or if you have administrator privileges(Admin user).
Reference Article :- http://blogs.adobe.com/dmcmahon/2012/06/06/cq5-5-members-of-administrators-group-not-able-to-unlock-...
I hope this would help you.
Thanks and Regards
Kautuk Sahni
Kautuk Sahni