VersionException when merging workspaces

[satyakishor.m]

I am running into the following exception when I try to merge two workspaces.

15:43:40,522 ERROR [stderr] (http--127.0.0.1-8080-1) javax.jcr.version.VersionException: Cannot add the child node named 'child2' under '/parent1' because it is checked in and the child's node definition '*' has an on-parent-version attribute of 'VERSION' (must be 'ignore' to add child to checked-in parent)
15:43:40,522 ERROR [stderr] (http--127.0.0.1-8080-1)           at org.modeshape.jcr.AbstractJcrNode.addChildNode(AbstractJcrNode.java:1050)
15:43:40,538 ERROR [stderr] (http--127.0.0.1-8080-1)           at org.modeshape.jcr.JcrWorkspace.copy(JcrWorkspace.java:193)
15:43:40,538 ERROR [stderr] (http--127.0.0.1-8080-1)           at org.modeshape.jcr.JcrVersionManager$MergeCommand.doUpdate(JcrVersionManager.java:1746)
15:43:40,553 ERROR [stderr] (http--127.0.0.1-8080-1)           at org.modeshape.jcr.JcrVersionManager$MergeCommand.doMerge(JcrVersionManager.java:1696)
15:43:40,553 ERROR [stderr] (http--127.0.0.1-8080-1)           at org.modeshape.jcr.JcrVersionManager$MergeCommand.doUpdate(JcrVersionManager.java:1762)
15:43:40,553 ERROR [stderr] (http--127.0.0.1-8080-1)           at org.modeshape.jcr.JcrVersionManager$MergeCommand.doMerge(JcrVersionManager.java:1685)
15:43:40,569 ERROR [stderr] (http--127.0.0.1-8080-1)           at org.modeshape.jcr.JcrVersionManager$MergeCommand.execute(JcrVersionManager.java:1656)
15:43:40,569 ERROR [stderr] (http--127.0.0.1-8080-1)           at org.modeshape.jcr.JcrVersionManager.merge(JcrVersionManager.java:939)
15:43:40,585 ERROR [stderr] (http--127.0.0.1-8080-1)           at org.modeshape.jcr.JcrVersionManager.merge(JcrVersionManager.java:783)
15:43:40,585 ERROR [stderr] (http--127.0.0.1-8080-1)           at org.modeshape.jcr.JcrVersionManager.merge(JcrVersionManager.java:768)

Following are CND and code details

CND

[Parent] > mix:versionable

  - name (string) copy

  + * (Child) version

[Child] > mix:versionable

  - name (string) copy

Code

session = repository.login("default"); // Logging into default workspace

Node root = session.getRootNode();

VersionManager vm = session.getWorkspace().getVersionManager();

Node parent1 = root.addNode("parent1", "Parent");

session.save();

vm.checkin(parent1.getPath());

vm.checkout(parent1.getPath());

Node child1 = parent1.addNode("child1", "Child"); // adding a child node under parent1

session.save();

vm.checkin(child1.getPath());

vm.checkin(parent1.getPath());

session.getWorkspace().createWorkspace("clone", "default"); // creating clone workspace

session = repository.login("clone"); // logging into clone workspace

vm = session.getWorkspace().getVersionManager();

vm.checkout("/parent1");

Node child2 = session.getNode("/parent1").addNode("child2", "Child"); // adding a new child node under parent1 in cloned workspace

session.save();

vm.checkin("/parent1/child2");

vm.checkin("/parent1");

session = repository.login("default");

vm = session.getWorkspace().getVersionManager();

vm.merge("/", "clone", false); // merging into default workspace is throwing exception

Am I doing some thing wrong here??