Prepare for VS. has / have prepared for

[sky3120]

(In a movie script)

A: If it reaches peak level...

B: We prepared for this, Doctor.

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If we write 'have prepared for this' in place of 'prepared for'? is there a nuance between them you can sense?

Thank you so much as always and have a good day.

[philo2009]

Only that the present perfect would tend to suggest more recent preparation.

[sky3120]

Thank you so much, so do you consider the past tense in the script wrong?

[bhaisahab]

Thank you so much, so do you consider the past tense in the script wrong?

What makes you think that?

[sky3120]

Oh, I am sorry. I misunderstood the reply. Thank you so much.