弹簧采用beam单元和壳单元采用*CONTACT_TIED_SHELL_EDGE_TO_SURFACE固连接触时出现如下错误，请问有遇到过的朋友或专家给说说，谢谢

massless node 269862 on the slave side of surface 8 type 7 This could be lead to a segment with no parent element defined.

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