clearing fieldValueCache in solr 4.6

[Matthew LeMay]

Hello.  We're just starting to use solr in production.  We've indexed 
18,000 documents or so.  We've just implemented faceted search results.  
We mistakenly stored integer ids in what was meant to be a string 
field.  So, our facet results are showing numbers instead of the textual 
values.

After fixing this oversight, reindexing the documents yields the correct 
results, but the faceted results still return the integer ids in 
addition to the enumerated values (the counts with the integer ids are 
zero).

It looks like fieldValueCache is doing this.  Is there any way to empty 
the cache?  I've tried reloading the core through the admin, which 
didn't work, and haven't been able to find (REST-like) API documentation 
on fieldValueCache.  We want to avoid emptying the index, if possible 
(or if that would even work).

thanks!

-Matt LeMay