用了一個質量單元做過渡，將72號節點與2823號節點剛接，遇到如下警告，請問該怎么處理？
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Term 1 (node 2823 ROTZ) on CE number 30 is not active on any element.
The first term of constraint equation number 10 has no active degree of
freedom associated with it. This constraint equation is ignored.
Gonewithwind 
