HERE 3 can1.bitrate

I mistakenly set can1.bitrate to 5000 in the UAVCAN menu of the HERE 3. Subsequently I seem to have lost communication between the HERE 3 and the PX4. The HERE3 no longer shows up on the Mission Planner "DroneCAN/UAV/CAN widow. In Mission Planner I set the CAN_P1_BITRATE to 5000 (despite min max values of 10000 and 100000) with no joy. Is there anyway to recover from this mistake?
G Siems