构建时间序列后无错误提示，但出的图不对，于是查询序列，发现输出中比平时多了一行，输出结果如下：

Time Series:
Start = 1
End = 25
Frequency = 1
[1]  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 24 23 25
attr(,"levels")
[1] 16,345,719 16,493,718 16,640,776 16,790,652 16,937,848 17,035,279 17,182,672 17,333,366 17,480,485
[10] 17,623,624 17,769,995 17,908,211 18,047,023 18,181,567 18,341,508 18,497,535 18,683,037 18,878,964
[19] 19,073,883 19,285,317 19,494,402 19,702,538 19,886,252 19,912,216


请问大佬们标红的这一行是怎么来的，如何删除呢？