I want to search for duplicates based on header X-Pm-Gluon-Id.
I know that all duplicates have the same X-Pm-Gluon-Id, anything other does not matter for my use case.

When i try to pass only -h X-Pm-Gluon-Id I got error Error: Invalid value: Provided number of headers to hash (1) is less than the minimal required number of headers (4).

It feels as bad UX, since i have to pass headers that does not mean anything in my use case.

Is there any reasons why we need at least 4 headers? If no, let's improve UX and will allow to pass single header to hashing.