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If you are installing from scratch you should use this version. If you are running 1.6.0 with no problems, it's fine to defer this upgrade. (The 1.6.1 database is compatible with v1.6.0, so rolling back your installation in the case of errors is trivial.)
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Core Modules
This release includes version 0.4 of the Logic module as a core module. You may upgrade this module, but you may not remove it or downgrade it below that level.
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