'SOLR collection - update content after modifying schema - automation possibilities for re-indexing existing content?

I need to change the SOLR schema of some existing SOLR collections: change some fields from stored="false" to stored="true".

What can I do to re-index the existing content ? Is there some support for automating this actions, or some tool that I can use ?

Or will I have to manually re-index each document (or write my own tool to do this) ?

Thank you.

solr

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