You may have to write your custom logic to do the same.Keep a count of errors if you have any in the form and disable the 'submit' button until you have count zero.
As @opkar mentioned, the migration tool should work for your usecase.The other option, I can think of is, copy the repository folder from the existing version to a new location. Start the new version of AEM pointing to that repository folder.
Hi,I think there is a mistake in the path given in the documenttry using this in the src [1] and see if it works[1] /libs/cq/tagging/gui/content/tags.html{?query,start,end}
Also refer some of the docs [1] [2] to understand about indexes and its configuration[1] https://docs.adobe.com/docs/en/aem/6-0/deploy/upgrade/queries-and-indexing.html[2] http://jackrabbit.apache.org/oak/docs/query/lucene.html