Summary key used before

What does this error mean?
I can’t find why it fails. The code doesn’t seem to have change and it works locally…

This means that the current version has a summary item that has been used before in one of the previous versions of the app. For example:

version1
Summary(item_1=SummaryItem(...))

version2
Summary(item_2=SummaryItem(...))

version3
Summary(item_1=SummaryItem(...))  # fails because 'item_1' is used before

Unfortunately the error message does not provide which key it concerns, this should be improved.

If you already suspect which summary item could cause the issue, you could try using a different key.

okay clear, I think what happended, that I had a Summary, published ones with the summary off, tried to publish again with the same summary and it failed. Forcing me to rename all keys. Not sure if this is the wanted behavior.