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NuoDB does not generally support downgrading between and within major, minor or maintenance releases. Supported downgrade exceptions are listed below:
NuoDB also supports downgrades between patch releases of the same maintenance build.
For example, downgrading from version 2.6 to version 2.5.6 is not supported, and likewise, downgrading from version 2.6.1 to 2.6 is also not supported. However, downgrading from version 2.6.1-8 to version 2.6.1-5 is supported.
Note: For information on Upgrading, see Upgrading to a New Release.