Cable registration to the same Interface results in a server error.

[penM000]

NetBox version

v3.6.3

Python version

3.8

Steps to Reproduce

1. Register the same termination at the time of cable registration by selecting the same termination.
2. A server error is output.
   
   

Expected Behavior

The UI displays an error that the same location cannot be registered. Or, it is expected that the same IF cannot be selected from IF candidates.

Observed Behavior

A server error was displayed.
This error is related to the database, and the registration process itself seems to be running.