[caxanga334]

I didn't had a better idea for the title but what is the meaning of this?

[sourcebans.smx] Verify Insert Query Failed: Column 'sid' cannot be null

My sourcebans isn't working and I get this.

EDIT: It's working, if it's stop again, I will post here
EDIT2: I know it's working now but, can anyone tell me what can cause this error?

[Snaggle]

I had a similar error yesterday, but instead of "sid" it was "aid". But it appears to be working still so I ignored it.