I am using Drupal 7 and I have a view displaying the Updated date. Unfortunately, the Updated date changes every time I save the node, even if no changes are made.

How can I configure the Updated date to be changed only if changes in fields are made??

P.S: I tried with "Rules", setting as action "Set a data value" and Data selector "node:changed", but it shows me this message: "The selected data property doesn't support writing."