portal_setup Import Steps

Importing steps of base profile by mistake, will be a disaster for the Plone site. At least I run into it twice. For example, a message like this might appear in log file:

TypeError: unhashable type: 'Missing.Value'

The webpage output simply keeps showing errors. What I do wrong is to import the Catalog Tool step of base profile, that ends up cleaning all the indexes in portal_catalog. Indexes such as Creator, Date, Description are there, but # distrinct values are 0. Luckily, after clicking Updated Catalog in Advanced tab, and the Plone site comes live again.

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