用了一个质量单元做过渡，将72号节点与2823号节点刚接，遇到如下警告，请问该怎么处理？
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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 
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