Error message

[DontGitUp]

Hello

Unfortunately I am having some issues running the ggparallel function regarding one variable (and only this one). I keep receiving the following error message:

Error in max(value) - min(value) :
non-numeric argument to binary operator
In addition: Warning messages:
1: In [<-.factor(*tmp*, idx, value = c(8255, 8185, 8124, 8101, :
invalid factor level, NA generated
2: In Ops.factor(dfxy$X[idx], dfxy$Freq[idx]) :
‘+’ not meaningful for factors
3: attributes are not identical across measure variables; they will be dropped

The respective column (header "X_AUSTRITTSGRUND") does not contain any characters, only integers ranging from 1 to 9 distributed across 8361 rows.

Unfortunately I haven't found any solution yet and any help is appreciated as I am new to using r.

Thank you! Cheers