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Issue during upgrade from 3.4.7 to 4.0.13


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I am getting the following error during the upgrade process -- retry does nothing but does give me a "Continue" but I am afraid if I continue something will go wrong:


Specified key was too long; max key length is 1000 bytes 

(NOTE: "(EDITED)" above is simply me removing my structure information)

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The only thing I can see on this via google is myISAM versus INNODB types in the DB:


There is a known bug with MySQL related to MyISAM, the UTF8 character set and indexes


  1. Make sure MySQL is configured with the InnoDB storage engine.
  2. Change the storage engine used by default so that new tables will always be created appropriately:

    set GLOBAL storage_engine='InnoDb';

Can something be done in the middle of an upgrade to "fix" this or can I just click "Continue" and see what happens? 

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