Server to cloud migration fails with validation error

[Deleted user]

Hello,

I'm trying to migrate our server to cloud. Even a very simple project with only 4 issues fails. In the migration log, I see this:

2021-01-19 16:21:36.684 ERROR IB project-import We couldn't import Custom Field Config Scheme 'Standardkonfigurationsschema für Story-Punkte'. Reason: Custom field 10106 is not found.
2021-01-19 16:21:35.940 ERROR IB project-import We couldn't import Issue Type 'Aufgabe '. Reason: IllegalArgumentException: Validation error: {IssueType=Ein Verknüpfungstyp mit diesem Namen existiert bereits.}. This caused 19 other items to fail.

The first error is somehow related to the story points. I would be okay with not migrating them and then updating them with csv.

The second error seems to block the whole migration, but I have no idea what it is referring to.

Any tips what I can do to migrate sucessfully?

[Deleted user · Accepted solution]

Okay, so I found the problem. I had a subtask (Unteraufgabe) with the name "Aufgabe ". That caused the issue. I renamed the subtask and the migration is working.