If your ruler is old and sick, you can abdicate, which doesn't take into account active loans.
1. Take a loan (in my case 400 gold)
2. Spend the money on castles and bitches
3. Abdicate due to poor health (Infirm in my case)
Now the loan is bound to the previous ruler and the new one has a clean loan history and can take a new one.
In my case, the former ruler also became a monk, so the loan-givers aren't getting anything.
1. Take a loan (in my case 400 gold)
2. Spend the money on castles and bitches
3. Abdicate due to poor health (Infirm in my case)
Now the loan is bound to the previous ruler and the new one has a clean loan history and can take a new one.
In my case, the former ruler also became a monk, so the loan-givers aren't getting anything.