Trello Sub-Task Issue Type

Summary

Currently importing project with Subtask from Trello using JIRA's External Import will result in following error:

Could not import checklists: there is no SubTask issue type in the target JIRA project.

This happens because JIRA's subtask is named Sub-Tasks.

Environment

6.4.12 -> JIRA 7.0.10

Steps to Reproduce

1. Open External System Import in JIRA
2. Import Trello Project which contains subtask

Expected Results

All the issues including subtask imported correctly with their respective issue type.

Actual Results

User is prompted with the following error:

Could not import checklists: there is no SubTask issue type in the target JIRA project.

Workaround

Create task type Sub-Task with name "SubTask" for the Project imported from Trello