'How can I put the 0 value at the end of the graph in my Rstudio graph?

I have created a simple graph in RStudio with ggplot2 but when creating the graph the 0 value of the y axis was not placed at the end of the graph. The result is that it looks like I have bars with values that do not exist. Does anyone have an idea how I can get the y axis back?

enter image description here

The code i used looks like that

ggp3 <- ggplot(mysubset1, aes(`Storage number`,`Proteolysis Tests`, fill=`Volunteer number`)) +
  geom_bar(stat = "identity", color = "black")+
  scale_fill_brewer(palette = "Dark2") +
  labs(title = "Lipolysis Tests Results of S.aureus", 
       x ="Strain number", y = "Halo Measurment [mm]")

ggp3

r ggplot2 graph

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'How can I put the 0 value at the end of the graph in my Rstudio graph?

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