The Lord's table is the New Covenant Jubilee. A regular event when every debt is cancelled. Not just the forgiveness of our debts towards God but a relinquishing of every debt between the covenanted people of God. The same blood that washes away our sin is received like a dialysis that is to flush out all the bad blood that may have accumulated in the corporate body. Jesus taught that it is impossible to receive forgiveness until you let go of unforgiveness. The table is thus an end of bondage and a new beginning of freedom towards God and each other just as Jubilee was.
There is a reason we should talk to a brother who has wronged us before we come to the table. It's not just so we can come in a right manner. It's because afterwards we have no right to mention it again. The same grace that forgives us requires us to forgive them.