I have problems with a repeating group from a template

Need help
1

Hai everybody,
I bought a template but I have issues to solve.
There appears" Repeating group property type: data source cannot refer to the same ellement"
What do they mean?
What do I have to chance?
Below a screenshot


problemhttps://bubble.io/page?name=index&id=immozoeker&tab=tabs-1

Next to the remark is standing " app level"
kind regards

2

Link does not open and there is no screenshot

3

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