Missing required key 'Value' in params.Tags[0]

[asafdavid230]

Hi, I'm trying to run the serverless deploy command without any flag and getting this error:
Missing required key 'Value' in params.Tags[0]
with the following custom block:

custom:
  inputBucket: input-bucket-111223344 # Change to unique name
  outputBucket: output-bucket-bucket26111990 # Change to unique name
  cf-changesets:
    requireChangeSet: true # optional defaults to false

After a short look in the plugin code I found the following variable:

  let stackTags = {
    STAGE: plugin.options.stage
  }

looks like it is required to be sent from the CLI argument for stage

in my case, I'm using yaml file definitions, (for stage too).
how can I deal with it?