I have scheduled H1B visa drop off appointment with my old i797 petition number

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Hi, How can I change my H-1B petition number in ustraveldocs after I have scheduled my visa appointment?
I have scheduled for visa drop-off appointment with my old client i797 petition number. I have applied for an amendment and received a new approved i797 petition number. I have not submitted my DS-160 yet and I am planning to enter my new petition number in my DS-160. But if I do that, the H-1B petition number from DS-160 does not match with ustraveldocs petition number.

So What can I do now?