> For the complete documentation index, see [llms.txt](https://carare.gitbook.io/mint-mapping-service/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://carare.gitbook.io/mint-mapping-service/transforming-and-publishing-your-dataset/repeating-the-transformation.md).

# Repeating the transformation

If your transformation produced invalid records, you may need to return to the original dataset and edit the mapping. Go back to your *Workspace* and select the dataset and then click on mappings.

![Editing a recent mapping](/files/-MAjghB7Bjm_o-zzrcsK)

Select the mapping that you need to edit from the list of *Recent mappings* and the mapping editor will open. Make any changes and preview the results as before. When you have finished making changes, close the mapping editor and return to the *Dataset options*. Select *Transform* and run the process again.