CAT_VALIDATION_ERROR_PRODUCT_CONDITION_INVALID fires when condition is missing or not one of NEW, REFURBISHED, or USED. Free-text descriptions like 'like new' or 'open box' are rejected.
Snap Catalog Manager's product schema has format and value rules per attribute. This issue is typically: missing a required attribute for the category, an invalid enum value (e.g., 'XL' submitted where 'M, L, XL' is the valid set), out-of-range numbers, or attributes that conflict across the feed.