Incompatibilities with Driver and Vehicle qualifications using SAP TM

what incompatibility type can I use to match driver and vehicle qualifications.

I was able to create two conditions

1. Vehicle resource - evaluation result is A1 (course required to drive this vehicle)

2. Driver - using data crawler - evaluation result - No

However, when I try to create an incompatibility, I an unable to choose a relevant option from the drop-down.

Could experts please help?

Thanks,