waring of ls-dyna

*** WARNING *** CP = 18.720 TIME= 19:12:24
Shape testing revealed that 1 of the 80537 new or modified elements
violate shape warning limits.
我把一个单元类型为solid 186 单元的带有0.2mm倒圆角的块，用5级精度自由划分，求解时出现上述问题，请问该怎么解决?看不懂这个警告。