Required fix version

[pm-v]

Could you please fix fixVersion adding

Using ->setFieldValue('Fix versions','Default');
I get an error '{"errorMessages":[],"errors":{"fixVersions":"data was not an array"}}'

Payload
[10015] => {"fields":{"project":{"key":"VT"},"issuetype":{"id":"10005"},"summary":"Summary","description":"Description","fixVersions":"Default","components":[{"id":"10112"}]}}