Trouble with AWS CLI for DRS

I'm trying to get output of a list of Server Names and SourceID for Elastic Disaster Recovery. When I run the following CLI

aws drs describe-source-servers --region us-west-2 --query "items[*].{Name:Tags[?Key=='Name']|[0].Value,sourceID:sourceServerID}" --output text

My output ends up looking like

None s-5c0f204f1e0e1a397

Any suggestions on how to get this to work?