在运用logistic回归时，fit()变量的时候报错怎么回事，显示因变量y不正确，logistic回归的因变量y有什么要求吗？

#0.构建数据，Y为因变量，其他为自变量
set.seed(1234)#设置随机种子，保证生成数据一致
log_data<- data.frame(Y = sample(0:1, 600, replace = T),
                      sex=sample(1:2, 600, replace = T),
                      edu=sample(1:4, 600, replace = T),
                      BMI=rnorm(600, mean = 22, sd = 3),
                      白蛋白=rnorm(600, mean = 35, sd = 6),
                      随机血糖=rnorm(600, mean = 4.75, sd = 1.2))
summary(log_data)
       Y               sex             edu            BMI            白蛋白         随机血糖    
 Min.   :0.0000   Min.   :1.000   Min.   :1.00   Min.   :13.21   Min.   :16.27   Min.   :1.036  
 1st Qu.:0.0000   1st Qu.:1.000   1st Qu.:2.00   1st Qu.:20.18   1st Qu.:30.94   1st Qu.:3.956  
 Median :1.0000   Median :1.000   Median :3.00   Median :22.17   Median :34.78   Median :4.816  
 Mean   :0.5017   Mean   :1.467   Mean   :2.57   Mean   :22.05   Mean   :35.04   Mean   :4.778  
 3rd Qu.:1.0000   3rd Qu.:2.000   3rd Qu.:4.00   3rd Qu.:23.98   3rd Qu.:39.19   3rd Qu.:5.579  
 Max.   :1.0000   Max.   :2.000   Max.   :4.00   Max.   :30.07   Max.   :54.01   Max.   :8.377