You get the message "Check and correct the level_depth field" from the menu Catalog > Tools to edit your categories (id_category:819)" when performing a CSV export.
There are a couple of solutions:
For the latter, you then need to look into the database tables in order to identify the category (by phpMyAdmin for instance):
Create a new entry in the table ps_category with the id_category = 819 ; id_parent = 1; position = 999
You will find the category at the root of your website
Delete data related to id_category 819 in the table ps_category
Look into ps_category if id_parent 819 exists: if it does exist, then replace the valuel id_parent 819 by id_parent 1: you will find this category at the root of your website.
Delete data related to id_category 819 in ps_category_shop
Also note that Store Commander Extension FixMyPrestashop verifies the integrity of all categories tables of your database, directly from Store Commander's interface, and also fixes any errors found, all in just a few seconds.
Download our dedicated Guides to learn how to manage your shop at lightning speed with Store Commander.