Whether a man can be absolved from one excommunication without being absolved from all?

❌ Objection 1 : It would seem that a man cannot be absolved from one excommunication without being absolved from all. For an effect should be proportionate to its cause. Now the cause of excommunication is a sin. Since then a man cannot be absolved from one sin without being absolved from all, neither can this happen as regards excommunication.

❌ Objection 2 : Further, absolution from excommunication is pronounced in the Church. But a man who is under the ban of one excommunication is outside the Church. Therefore so long as one remains, a man cannot be loosed from another.