A single word is wrong in an otherwise useful recording. Replacing only that word can leave you judging it in isolation. A practical alternative is to record the sentence and a little of its surrounding passage.
Mark the smallest complete thought
Read the existing transcript and identify where the thought begins and ends. If the correction changes the meaning of the following sentence, include that sentence in the pickup too.
Keep a note of the original take and the reason for the replacement. This makes it easier to distinguish a factual correction from an optional delivery change.
Listen before you record again
Play the neighbouring passage at a comfortable level. Notice the speaker’s pace and the distance between phrases. If you can use the same recording arrangement, retain it; if the room or microphone has changed, record that fact rather than promising an invisible edit.
Compare complete versions
Place the replacement in a copy of the edit. Listen from the preceding sentence through the following one. The useful question is whether the passage remains clear and coherent, not whether the isolated pickup sounds impressive.
Ask the speaker to confirm the corrected meaning when relevant. For a broader preparation routine, see keeping useful take cues. A little context at recording time gives the editor more information when deciding where a replacement belongs.