forced to install wizard after patching CentOS 6

I have a Cacti installation that is several years old.  Once, several years ago, after patching my installation was blanked.  I think I found there were some php or apache modules not loading and I was able to find an old config file and fix.


I cannot remember what the issue was but it has happened again.  When I click on my cacti installation, I get dumped into the installation/setup wizard screen.


This must be a common occurrence as a result of either php, Apache or MySQL patches.  Does anyone have a quick fix for this?  I do not want to lose my historical data.
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