Concessions are finalOnce an opponent concedes your stroke, you cannot play on — your score stands at the conceded figure regardless of what happens next.
Your partner’s score is the one at riskIf you continue to putt after a concession and it could help your partner read the putt, your partner’s score for that hole cannot count for the side.
The key test is whether it helps your partnerIf your ball is on a completely different line and playing on could not reasonably assist your partner, continuing after a concession is not an issue — the rule only applies when there is a clear benefit.