upgrading from CQ5.5 to AEM 6.1: Privilege definition with name 'crx:replicate' already exists.

I am facing an issue when upgrading from CQ5.5 to AEM 6.1 .

I have already deleted the index files and am able to regenerate them when I run the migrate command . 

java -Xmx4096m -XX:MaxPermSize=2048M -jar aem-quickstart-6.1.0.jar -v -x crx2oak -xargs -- -o migrate

However, I see the following error in the console (excerpt below), mainly the access privilege error:

1. Privilege definition with name 'crx:re plicate' already exists.

Stack Excerpt:

1. 14.09.2015 19:22:09.171 *ERROR* [com.adobe.granite.crx2oak.quickstart.extension.
2. Main] Main.java:352 Repository migration failed. java.lang.reflect.InvocationTargetException: null
3. at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.
4. 0_75]
5. at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.7.
6. 0_75]
7. at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:
8. 1.7.0_75]
9. at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.7.0_75]
10. at com.adobe.granite.crx2oak.quickstart.extension.Main.<init>(Main.java:
11. 321) [crx2oak-quickstart-extension.jar:1.0.14]
12. at com.adobe.granite.crx2oak.quickstart.extension.Main.main(Main.java:39
13. 2) [crx2oak-quickstart-extension.jar:1.0.14]
14. at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.
15. 0_75]
16. at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.7.
17. 0_75]
18. at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:
19. 1.7.0_75]
20. at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.7.0_75]
21. at com.adobe.granite.quickstart.base.impl.Main.<init>(Main.java:862) [ae
22. m-quickstart-6.1.0.jar:0.0.0.0_0_0_6_1_]
23. at com.adobe.granite.quickstart.base.impl.Main.main(Main.java:940) [aem-
24. quickstart-6.1.0.jar:0.0.0.0_0_0_6_1_]
25. Caused by: javax.jcr.RepositoryException: Failed to copy content
26. at org.apache.jackrabbit.oak.upgrade.RepositoryUpgrade.copy(RepositoryUp
27. grade.java:335) ~[na:na]
28. at com.adobe.granite.crx2oak.CRX2Oak.crx2oak(CRX2Oak.java:393) ~[na:na]
29. at com.adobe.granite.crx2oak.CRX2Oak.crx2oak(CRX2Oak.java:303) ~[na:na]
30. at com.adobe.granite.crx2oak.CRX2Oak.main(CRX2Oak.java:256) ~[na:na]
31. ... 12 common frames omitted
32. Caused by: javax.jcr.RepositoryException: Privilege definition with name 'crx:re plicate' already exists.
33. at org.apache.jackrabbit.oak.security.privilege.PrivilegeDefinitionWrite
34. r.writeDefinitions(PrivilegeDefinitionWriter.java:106) ~[na:na]
35. at org.apache.jackrabbit.oak.security.privilege.PrivilegeDefinitionWrite
36. r.writeDefinition(PrivilegeDefinitionWriter.java:67) ~[na:na]
37. at org.apache.jackrabbit.oak.security.privilege.PrivilegeManagerImpl.reg
38. isterPrivilege(PrivilegeManagerImpl.java:86) ~[na:na]
39. at org.apache.jackrabbit.oak.upgrade.RepositoryUpgrade.copyCustomPrivile
40. ges(RepositoryUpgrade.java:496) ~[na:na]
41. at org.apache.jackrabbit.oak.upgrade.RepositoryUpgrade.copy(RepositoryUp
42. grade.java:283) ~[na:na]
43. ... 15 common frames omitted

Any help in resolving is appreciated.

thanks,

PVR

PS:  I have also tried hardcoding the datastore path for windows (full absolute path) as mentioned in : https://docs.adobe.com/docs/en/aem/6-1/release-notes/known-issues.html#Known%20Issues

to no use !