Body diodes in MP6551

I am using the MP6551 to control a DC motor. When stopping or reversing the motor the peak currents are close to the value of the internal current limiter. According to the data sheet this should not be a problem.
But I have experienced a few times that one of the body diodes has been damaged and converted to a short - zero Ohm.
How can I protect the body diodes? External diodes seem not to help.