ON boot - ERROR: you must define at least one Data Source

[Bummer]

Hey all,

I have set up a new 32bit box with pfSense 1.2.3. When booting up the box, 2 times I'll receive the error below. What is it and how do I fix it?

php: : RRD create failed exited with 1, the error is: ERROR: you must define at least one Data Source

Thanks!