Hi @sehyun0701 ,

I cannot reproduce the problem you described on my side.

Can you share your drawings here?

BTW, if you have the same annotative scales in both drawings, there shouldn't be any xxx_XREF scales in the list jf scale in master drawing. For example, if you have 1:100 scale in both drawings (Master and Xref), then there shouldn't be 1:100_XREF scale in the Scale list in the Master drawing.