TYPO3 Core

Full story (no answers)
http://forum.typo3.org/index.php/t/201013/

Short

Prerequisites:
CMS: TYPO3 6.1.7 (vanilla install - not updated from previous versions)
Ext:version installed (default?!)
Ext:workspaces not installed

Problem:

1: Record "#" (tt_content:#) cannot be swapped or published independently, because it is related to other new or modified records.

Reason:
\TYPO3\CMS\Version\DataHandler\CommandMap::applyWorkspacesDependencies()
L:458 $dependentElements = $dependency->getNestedElements($outerMostParent);
$dependentElements returns two entries:
"tt_content:#" (expected result) and ":" (unexpected second key with missing table and uid)
The second key will produce the above Error (reproducible on another 6.1.7 machine) making it impossible to switch any records.

1. WEB > List/Page > new tt_content Element
2. WEB > List > version > new version
3. WEB > List > version > swap = above error

Background:
We are preparing our extensions from 4.5 to 6.2 for a new project but since it was delayed we start migrating to 6.1 which was suggested by the TYPO3 Team.