The value Issue key is invalid.

[Vikas Bhatia]

Im trying to import issues on the cloud version of jira but fix the issue key and get the error above. Please help!

[Nic Brough -Adaptavist-]

The issue key in an import needs to be a reference to an existing issue key - the import will be using it as an update, or a place for sub-tasks.  You don't get to set an issue key in the import - if your project is on ABC-123 and you import 100 issues, they will be ABC-124, ABC-125... ABC-223