Disable the appropriate Product Comparison module
Edit and then Run the following SQL
Code: Select all
DELETE FROM "isc_shopping_comparison_taxonomies" WHERE id = "shoppingcomparison_googlemerchantFOO";
DELETE FROM "isc_shopping_comparison_categories" WHERE "shopping_comparison_id" = "shoppingcomparison_googlemerchantFOO"
Once you've done that, grab the latest version of the taxonomy and shopping Comparison module... upload them and then re-enable the module...
This will load the latest taxonomy into the database and hopefully correct the issue.