Constellix offers you "Version Control" which allows you to "Roll Back" to a previous version before an update/change was submitted.
First: click on your domain
Next: You will select "View History"
Now: You will see your versions of your Constellix Account Updates. Here you can choose a version to roll back too and view any notes you have made when committing changes to the records in your domain.
You select the Version you want to go back to and then select "Restore This Version". You will see a pop up asking you to confirm the changes.
You can also compare the versions, if you select two.
Below is an example of a comparison of v.6 & v.7