A practical workflow
Check the original link
Confirm the active campaign and location before reprinting. Use the saved export rather than rebuilding the destination from memory.
Remove confusing copies
Take down the damaged card once the replacement is ready. Check nearby surfaces for older cards with different instructions.
Test in place
Scan the new card after it is installed. Compare the customer page and Google destination with the approved setup.
Avoid this mistake
Avoid creating a new campaign simply because the paper is damaged unless a separate campaign is actually needed.
What to check
Check scan reliability at the physical stand before judging changes in customer activity.
Test the whole physical journey
Check both the printed code and the page behind it. A successful scan is only the entry point: the customer still needs to recognise the business, describe an experience and understand the Google handoff. Use the final material under ordinary lighting. Keep a copy of the approved artwork so a replacement does not accidentally introduce a different destination.