I checked with a meter. The meter shows 485 ohms for E (red probe) to C (black probe) but by reversing the probes it doesn't show any value.
What this mean?
I don't know IGBT with internal protection diodes similar to MOSFET. IGBT can absorb a certain amount of transient energy anyway, specified as avalanche energy in datasheet, but it's considerably lower than with MOSFET. But you can't see this parameter from measurements with a meter.