Using Confiforms to create JIRA issue, getting error message when adding Epic Link

[Erin Smith]

I have created a Confiforms form in Confluence to create a JIRA issue (task) based on the information input into the form. Everything works except the Epic Link. Based on all the Googling I have done I don't see any reason why this is failing, so I'm hoping someone in this community can help. I am receiving this error message: java.lang.RuntimeException: Internal Server Error

JIRA v6.4.8 with

JIRA Agile v6.7.16

Confluence 5.8.17

Broken Code: "customfield_10006": "OSS-309", Confirmed the Customfield ID and Epic Link ID

Full Code:

{
"fields": {
"project":
{
"key": "OSS"
},
"summary": "[entry.Summary.escapeJSON]",
"description": "*Request Details:* [entry.Details.escapeJSON] \n\n *Project Name:* [entry.RelatedProjectName.escapeJSON] \n\n *Project Key:* [entry.ProjectKey.escapeJSON]\n\n *Project IT#:* [entry.ProjectIT.escapeJSON]\n\n *LOB:* [entry.LOB.escapeJSON]\n\n *Agile Training:* [entry.DateAgileTraining.escapeJSON]\n\n *Agile Coach:* [entry.AgileCoach.escapeJSON]\n\n *Tools Training:* [entry.DateToolsTraining.escapeJSON]\n\n *Additional Admins:* [entry.AdditionalAdmins.escapeJSON]\n\n *Trainees:* [entry.Trainees.escapeJSON]",
"components" : [ {"name": "[entry.RequestType.escapeJSON]" } ],
"customfield_10006": "OSS-309",
"issuetype": {
"name": "Task"
}
}
}

Thanks.

[Alex Medved _ConfiForms_]

What type your "customfield_10006" field has in JIRA?