1. The court may at any time, for good cause and after notice to the guardian, increase or decrease the amount of the bond required of a guardian.
2. The court may at any time, where the bond or the sureties are determined to be insufficient or for other good cause, require a guardian to execute and file a new or additional bond. The court may exonerate the sureties on a former bond from any liabilities thereunder arising from the acts or omissions of their principal after such exoneration.