"I hope that won't be repeated again." Somebody made a mistake, etc. Would you say that?

Question

"I hope that won't be repeated again."  Somebody made a mistake, etc. Would you say that?

Answer

It is correct.
More likely, however would be:
"That had better not be repeated again."  (This implies consequences if it is)
"I trust that there won't be a repeat of this." (The consequences are not directly stated, but subtly implied.
Most direct - "Do that again and you're dead meat." Not eloquent, but effective.

Answer

Sure, it's ok.