Symptoms

When you try to move a page to another space it renders an error in logs but nothing appears in the UI and the process doesn't finish as expected.

The following appears in the atlassian-confluence.log:

[atlassian.event.internal.AsynchronousAbleEventDispatcher] run There was an exception thrown trying to dispatch event [com.atlassian.confluence.event.events.content.page.PageMoveCompletedEvent[source=page: XXXXX (ID)]] from the invoker [SingleParameterMethodListenerInvoker{method=public void com.atlassian.confluence.links.RelatedContentRefactoringListener.handleEvent(com.atlassian.confluence.event.events.content.page.PageMoveCompletedEvent),listener=com.a
tlassian.confluence.links.RelatedContentRefactoringListener@2eefd899}]
 – url: /pages/movepage.action | userName: username | referer: PAGE_URL | action: movepage
java.lang.RuntimeException: A page already exists with the title PAGE_TITLE in the space with key SPACEKEY

Cause

This error is caused due to a bug in the application tracked here: CONF-34649 - Getting issue details... STATUS

It happens when you move a page to another space that contains a page in trash with the same page name.

Resolution

Option 1:

1. Change title of the page that will be moved before moving it.
   i.e. "Release Notes" to "Release Notes v1.0"
2. Move page to desired location
   The new title can be changed back to the original after completion.

Option 2:

1. Check the error in the logs to find the space which contains the deleted page (this may not be the same space as the page you are moving).
2. Purge the trash in that space (documentation).
   When the trash is purged, all attachments on purged pages are permanently removed as well.