We updated Magento
the product with the id of 11 is the one which has the custom fields set which we wanted to duplicate.
This was working fine before the upgrade but now we get this error: SQLSTATE: Integrity constraint violation: 1062 Duplicate entry '26-0-1-161' for key 1
and the product does not show up in the store after the duplication fails...
We've tried clearing the cache and the logs so it seems to be a database problem but please do whatever is necessary to fix the problem, we need to be able to duplicate product with ID 11 again, all other products can be deleted if needed. Please do not delete any categories.