geom_col issue: `position_stack()` requires non-overlapping x intervals

I have a dataframe df:

df <- data.frame (group  = c("east", "west"),
                  value = c(1/3, 2/3)
)

d <- data.frame(x = rep(df$value, times = c(2,1)))  %>%
  ggplot(aes(x = x, y = 1, fill = x)) +
  geom_col(position = 'stack', color = 'white', linewidth = 0.1, width = 1) +
  scale_y_continuous(limits = c(-5, 5)) +
  theme_void()

I got the following warning message:

`position_stack()` requires non-overlapping x intervals 

The plot I got is like this. But I want the blue bars to be stacked on top of another and have the same width, with the dark blue part taking 1/3 of the width and the light blue part taking 2/3.

Also, how can I get rid of the warning message?

df <- data.frame (group  = c("east","east", "west"),
                  value = c(1/3,1/3, 2/3),
                  x = c(1L,0L,0L)
)

df$group <- factor(df$group,levels=c("west","east"))
library(ggplot2)

ggplot(data = df,
       aes(x = x, y = value, fill = group)) +
  geom_col(linewidth = 0.1, width = 1) +
  coord_flip(xlim = c(-2,2)) +
  scale_fill_manual(values = c("east"="darkblue",
                               "west"="lightblue")) +
  theme_void()