Issue #2869257 by phenaproxima: Content Moderation is incompatible wi…

…th Lightning

README.md

@@ -138,12 +138,20 @@ your environment, but generally you will not need to do this.
 ## Known Issues
 
 ### Media
-
 * If you upload an image into an image field using the new image browser, you
   can set the image's alt text at upload time, but that text will not be
   replicated to the image field. This is due to a limitation of Entity Browser's
   API.
 
+### Workflow
+* Lightning Workflow is based on Workbench Moderation, which is incompatible
+  with the experimental Content Moderation module included with Drupal core
+  8.3.0 and later and serves the same purpose as Workbench Moderation. We plan
+  to seamlessly migrate Lightning Workflow to Content Moderation once it is
+  stable, most likely in Drupal 8.4.0. But for now, installing Content
+  Moderation alongside Lightning Workflow may have unpredictable and dangerous
+  effects, and is best avoided.
+
 [issue_queue]: https://www.drupal.org/project/issues/lightning "Lightning Issue Queue"
 [meta_release]: https://www.drupal.org/node/2670686 "Lightning Meta Releases Issue"
 [template]: https://github.com/acquia/lightning-project "Composer-based project template"