This wizard page displays all illegal or invalid values based on the attribute type. For example if the attribute price with type "Number" contains values with text instead of a number. Confirming this dialog has two consequences:
- The attribute type is automatically changed to "Text".
- Questions which are attached to these attributes are detached to avoid breaking some advisor functionalities (especially for numeric questions).
This step only appears if the data file is updated. As a consequence, during the initial uploading process of a new file this step is skipped, because new and old attribute values cannot be compared.