pads提示警告：Section *DEL_ATTRIBUTE*

  我在第一次从pads logic中向pads layout中导入原理图的时候没有提示警告，但是我在第一次的基础上再重复一次的时候就会提示很多的警告类似于：
Line 6 , Section *DEL_ATTRIBUTE*"hight"
* WARNING: Processing command to delete attribute "hight" from Component C1.
*          The attribute is also inherited from Decal CC0402.
*          The change is not fully reconciled for cases where the schematic
*          does not support hierarchical attributes.

Line 7 , Section *DEL_ATTRIBUTE*
"SMD(Y/N)"
* WARNING: Processing command to delete attribute "SMD(Y/N)" from Component C1.
*          The attribute is also inherited from Decal CC0402.
*          The change is not fully reconciled for cases where the schematic
*          does not support hierarchical attributes.
不知道为什么，这个也不影响PCB威廉希尔官方网站 ，但是就是想知道为什么，求高手指点，小弟不胜感激~~