2008 Honda Accord Wrong Fuel

Hello there.

I accidentally pumped 15 liters of unleaded into a 60 litre capacity diesel fuel tank. I managed to drive the car home the final 160 miles without incident.

What should I do now?

Should I have the tank drained or might it be okay to keep the tank topped up with diesel in the hope that the unleaded evenyually works through the system.

many thanks in advance for your advice.