Committing Links
There is no Undo for relinking. Once a file has been relinked and the project saved, the project always remembers the new link (the original link is forgotten). For this reason, no files are actually relinked until you click Commit Links.

The Automatically Find and Relink option is the only relinking process that does not ask you to verify links before they are committed. If you use this option and are unsatisfied with the results, close the project without saving to prevent the new links from being committed.
To commit links:
2. Click Commit. You are asked to verify committing links.
3. Do one of the following:

Click
Yes to commit links.

Click
No to stop without affecting files.