Recently I visited a post I made in gambling discussion with the title "Gambling exposed to Children"

Link: https://bitcointalk.org/index.php?topic=5351790.0

And the thought of replying to a post then realized it has been locked, I didn't remember locking down the thread so I tried unlocking it and it didn't work but gave me a message.

"This was locked by an administrator. You cannot unlock it."

Can it be unlocked or not?