Not able to deploy

[Vivek200305]

Beginning deployment of service [corvid-firestore-connector]...
Created a .gcloudignore file. See gcloud topic gcloudignore for details.
Uploading 0 files to Google Cloud Storage
100%
File upload done.
ERROR: (gcloud.app.deploy) INVALID_ARGUMENT: The first service (module) you upload to a new application must be the 'default' service (module). Please upload a version of the 'default' service (module) before uploading a version for the 'corvid-firestore-connector' service (module). See the documentation for more information. Python: (https://developers.google.com/appengine/docs/python/modules/#Python_Uploading%%20modules) Java: (https://developers.google.com/appengine/docs/java/modules/#Java_Uploading%%20modules)