Repeated measures anova in R studio error

everybody! I have a data in the following format

df <- data.frame(id  = c(1, 1, 2, 2), 
            time = c("pre", "post", "pre", "post"),
            type = rep(c("ctrl", "exp"), each =2),
            values = c(61.39881, 49.01473, 31.69452, 32.19900))

And I am not able to run an Sphericity test for my ANOVA repeated measures analysis with the following code

library(rstatix)
res.aov <- anova_test(data = df, dv = values, wid = id, within = c(type, time))

The error I get is
Error in lm.fit(x, y, offset = offset, singular.ok = singular.ok, …) :
0 (non-NA) cases
But I have no NA and a total of 848 subjects

Can someone help me, please? Thanks!