slot x contains an item.....(console spam)

[andreosas]

hello recently my server console has begun spamming
"slot x1 contains an item worth y1"
"slot x2 contains an item worth y2"
"at the time of execution, total value sits at 1"
this is happening around 20-30 times a second if not more
so the question is, is this a bug, a fault of myself or just something i shouldnt care about?

 

[Malice]

I believe these are Xycraft logs. MultiTanks I'm told.