Should not negatively impact your tummy tuck
Generally speaking, you should be recovered enough from your surgery at one year that this would not negatively affect your muscle repair, as your tissues would be strong enough to withstand vomiting. If you have concerns, however, you should probably speak to your surgeon.
Although we cannot say for sure, it is unlikely to disrupt your repair after a year. The scar strength is maximum at ~6 weeks. The best approach though is to be examined by your plastic surgeon to ensure your repair/result is ok. Best wishes.