Artifacts empty for deployment release

[Sahil Bhola]

I am using the api deploy/environment/227869739/results to fetch the deployment release data for the particular environment, 

but there is the scenario where the items field in deployment version section is coming empty. 

ex -   {            "deploymentVersion": {  "id": 226234698,"name": "release-R2101-1",                "creationDate": 1612513302511,   "creatorUserName": "d962725",     "items": [],

What could be the reason this particular deployment is not giving any build related data in items section?