Unable to create Subtask-REST API-Client Account is required-SOLVED

Not sure if this is right place, but really stumbled upon- no any info on google:

JIRA Service Desk 3.4.

curl -D- -u user:pass -X POST --data “{“fields”:{“project”:{“key”:“TECH”},“parent”:{“key”:“TECH-456”},“summary”:“Test ChargenNr”,“description”:“some description”,“issuetype”:{“name”:“Sub-Task”}}}” -H “Content-Type:application/json” https://compnay.com/rest/api/2/issue/

i’m getting:customfield_10107":"Client Account is required

Do you know what custom field 10107 is? If not, make a call to:

https://company.com/rest/api/2/issue/{{issueId}}/editMeta

Looks like there’s some required field that you’re not providing a value for.

found out and solved it, created a post:

but strange i had to submit that field, documentation don’t mention it