I ran out of flags, the error message is shown for further flags as
you can flag for mod's attention only x times a day.
Even if I raised some other flags.
Here I am raising a duplicate flag, which will push it into Close Vote review queue.
But the error message shown is
Then I checked it in Travel Stack Exchange to check whether it applies only in Stack Overflow or not.
And the same happens in Travel too.
and the message is
But in both 2 cases, I didn't flagged for moderator's attention. I flagged it with Closure recommendation and it will go to Close Vote review queue.
So the message should be something like