> 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](https://142262255-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MAQARG1mep5UziFxS9K%2F-MAjVn0f3fk7wGYdIa0r%2F-MAjghB7Bjm_o-zzrcsK%2FEditing%20a%20recent%20mapping.jpg?alt=media\&token=bd4c0fa5-b443-40d4-a951-5c25cbf09459)

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.