Preventing Content Authors from Overwriting Each Other

Summary:

Searching for a way to prevent or alert content authors overwriting.

Content (required):

We have multiple content authors all collaborating on writing answers. Sometimes they unwittingly are working on the same one, resulting in the work of one of them being overwritten by the other. Is there a way to prevent this from happening, or at least to alert one or both of them that a record is already being edited by someone else?

Version (include the version you are using, if applicable):

20D

Code Snippet (add any code snippets that support your topic, if applicable):