Is there a reason a blank key is allowed in a stream

Question

I am currently testing streams to insert data and I managed to insert a blank key, should this be allowed? This is the output from listkeys

    },
    {
        "key" : "",
        "items" : 3,
        "confirmed" : 3
    }
]

Answer 1

Yes, there is no problem with having a blank key. The empty string is a valid string.