why Eval metrics do not change throughout all rounds

[aynesss]

After changing only the dataset, Here is what I found as results:

Round 1
\Eval metrics: loss=0.823, accuracy=0.673
Round 2
\Eval metrics: loss=0.823, accuracy=0.673
Round 3
\Eval metrics: loss=0.823, accuracy=0.673
Round 4
\Eval metrics: loss=0.823, accuracy=0.673
Round 5
\Eval metrics: loss=0.823, accuracy=0.673
....
Round 100
\Eval metrics: loss=0.823, accuracy=0.673

I can't understand the reason, Help please