NetBox version
v3.6.4
Python version
3.8
Steps to Reproduce
- Create a rear port, with position 1.
- When creating a front port, use Alphanumeric ranges to create a front port that is greater than or equal to the rear port.
- Server error is confirmed.


Expected Behavior
Expect that the creation process will not take place. If no rear port is selected, no creations can be made.
Observed Behavior
The create process could be performed with no available rear ports.