Magento - Setup Inventory

Do you know what is enable quantity increment?

sir can u give me personally training

don't change inventory

SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '15558-1' for key 'UNQ_MGOM_CATALOGINVENTORY_STOCK_ITEM_PRODUCT_ID_STOCK_ID', query was: INSERT INTO `mgom_cataloginventory_stock_item` (`product_id`, `stock_id`, `qty`, `use_config_min_qty`, `is_qty_decimal`, `use_config_backorders`, `use_config_min_sale_qty`, `use_config_max_sale_qty`, `is_in_stock`, `low_stock_date`, `use_config_notify_stock_qty`, `use_config_manage_stock`, `stock_status_changed_auto`, `use_config_qty_increments`, `use_config_enable_qty_inc`, `is_decimal_divided`) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
plz solution give me

U should show actual project instead of overview