Recently my gouge cluster (think its you call it that way)

so I managed to get a "new" one from the same type of prelude (VTI, same year, same BHP), thing is.. when i connect the new one, when i start the car, the airbag light comes ON (steering wheel was not removed, so airbags weren't touched).
When I install the old one back into place, the lights are all OK.
Any idea of what can be causing this?
Best Regards.