Add bulk interface validation missing causes server error

[rfl64]

NetBox version

v3.5.1

Python version

3.8

Steps to Reproduce

1 click in add interface on any device
2 try to create severals interfaces in bulk mode for example Gi[11-8] (of course wrong interface order should not cause application error)

3 click save button

Expected Behavior

a warning message would be spected to correct wrong interface order

Observed Behavior

Server Error
contact server admin message raised.

[dhenschen]

I would like to take ownership of this issue.

[arthanson]

@dhenschen do you still want to take ownership of this?

[dhenschen]

@arthanson You can move this back to unassigned. Thanks!