Ignores a default subclass when
Fixes issue described in #30399: A default value on the
The change was introduced by #17169 and it was meant to affect
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Fixes issue described in #30399: A default value on the inheritance column prevented `child.becomes(Parent)` to return an instance of `Parent` as expected, instead it returns an instance of the default subclass. The change was introduced by #17169 and it was meant to affect initialization, alone. Where `Parent.new` is expected to return an instance of the default subclass.