Github user srowen commented on the issue:
https://github.com/apache/spark/pull/20164
I might be missing something, but the user sets the raw prediction col
name. Now it's going to use a different name than what the user set.
Isn't it simply an error to apply a second model, specifying the same raw
prediction col name? you have to use a different name or else rename/remove the
original.
Just like any other col that the code will add, if the user asks for a col
to be added that exists already it's an error. Right?
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