Hi everyone, I am using jira server v8.22.2
I would like to import 'sub-task' from CSV to JIRA linking the sub-tasks to existing task, and I already get parent id from export csv
The CSV is like:

when i import i cannot find mapping "parent_key"option, so i only use parent_id mapping to make parent-child relationship. and i have tried not using issue_id, or using parent_key to map the parent-child relation. it always appear parent id error. what should i do to fix this problem?
