What the warning means
The price warning appears when a product's price has changed after a customer submitted an offer request. For example, a customer offers $66.99 on a $69.99 product. You later change the product's price to $59.99. Their existing checkout link is still tied to the original offer, so what they end up paying may no longer match what you intended.
Where you'll see it
On the Offers page, a small warning icon appears next to the status of any affected offer request.
On the offer request detail page, a banner shows the original product price, the current product price, the agreed offer amount, and what the customer will actually be charged if they complete checkout through the link they already have.
What the numbers mean
Original price is the product's price when the customer submitted their offer.
Current price is the product's price right now.
Agreed amount is the offer you accepted or countered to.
Effective checkout price is what the customer will pay if they open their existing checkout link today. If this is higher than the agreed amount, the warning is flagged as critical.
What to do
If the customer would pay more than agreed, cancel the existing checkout link by deleting the draft order (see: How do I cancel an offer I've already accepted), then re-accept or re-counter the offer to generate a fresh link at the correct price.
If the customer would pay less or the same, no action is needed. The warning is informational.
If you're changing many product prices at once, check the Offers page for warning icons before the change goes live.