The non-admin CSV Importer gives an error for the parent Id field

Issue Summary

When performing an import from the bulk creation CSV import (on the create issue screen) and set the value for a Task and its sub-tasks on the CSV file, the import troughs an error about Subtask 'test CSV' doesn't have a valid Parent Id selection. Issue will not be created.

We got this same error in these scenarios:

1. Setting an issue Id and parent Id arbitrary and the CSV file;
2. Using an issue Id from an already created task in the project

Environment

Jira Cloud

Steps to Reproduce

1. Create a CSV file with the Issue Id and Parent Id column;
2. Use the non-admin CSV import (create issue screen > Import issue button);
3. Mapp the columns of issue Id and parent Id
4. Begin the CSV import

Expected Results

The import should create the Task and the Sub-task accordingly as in the CSV file.

Actual Results

The import stops with the following error:

 
Subtask 'test CSV' doesn't have a valid Parent Id selection. Issue will not be created

Notes

Workaround

A workaround will be run the CSV import through the External system import, accessible only by Jira administrators