I'm getting the error below during my re-index:

The Flat Catalog module has a limit of 64$d filterable and/or sortable attributes.Currently there are 92$d of them.Please reduce the number of filterable/sortable attributes in order to use this module

How can I fix it? Is that a limit in MYSQL?

Any help is appreciated.

2 Answers 2


yes, it's limitation of mysql: A table can contain a maximum of 64 secondary indexes.https://dev.mysql.com/doc/refman/5.7/en/innodb-restrictions.html

Simple solution is not use flat indexex.


Another option is to change the default config value, that is currently used, in your own module. Create \Namespace\Module\etc\config.xml and put following into it

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

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