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Answers and rating deltas for

Why I'm getting an error when I'm trying to insert a new object in db?

Author Votes Δ
Mehrdad HosseinNejad Yami 1 +2.60
dragos.pavel 1 +2.66
Salim 0 -0.25
NoDataFound 0 -0.41
Last visited: May 14, 2020, 3:16:00 AM