Update existing issues using CSV import does not work

[April_Taylor]

I am trying to update one field for thousands of existing issues in a team-managed project on Jira cloud. I have admin access and am using External System Import with a CSV file. 

I have scoured threads and followed every instruction out there, but nothing works. 

My CSV file has 3 fields: Issue Key, Issue Summary and Process Number (the field I want to update).

I have also tried mapping additional fields - parent ID, Issue Type, Issue ID and more. NOTHING works. 

Please tell me if I am missing a step or if what I am trying to do just cannot be done. 

Below are screenshots showing my import and the error I receive. 

[Javier Garay G]

I'm facing exactly the same issue, also with admin permissions.

Did you manage to resolve it?

[April_Taylor]

I have not resolved it. Was hoping someone would have an answer, but it doesn't look like anyone does. 

[Tansu Akdeniz]

Hi @April_Taylor 

Welcome to the community.

Your mapping should be enough indeed.

Do you import any other fields? Or only these three fields?

Please also check this page: CSV import error: Unexpected failure occurred. Importer will stop immediately. Data may be in an unstable state 

[April_Taylor]

@Tansu Akdeniz I've tried every which way. In the example above I was only importing the 3 fields shown.