You must have changed your products_options_name field from the default varchar(64) to blob type.
To keep it as a blob and have the upgrader not croak, you'll need to edit line 63 of the mysql_upgrade_zencart_1302_to_135.sql file from this:
Code:
ALTER TABLE products_options_values ADD INDEX idx_products_options_values_name_zen (products_options_values_name);
to this:
Code:
ALTER TABLE products_options_values ADD INDEX idx_products_options_values_name_zen (products_options_values_name(50));
... and then resume upgrading starting with the 1302-to-135 step
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