1) Clean your repository.
2) remove unwanted nodes.
Solution: You can use following package to clean up nodes based on certain criteria.
1) Install this package using package manager
2) Go to http://HOST:PORT/apps/tools/components/cleanNode/run.html
3) Select your options
4) Select run
Note: Please use this utility with care, As it leads to deletion of node from repository. Please DO NOT use it in production without proper testing.