Magento 2 : How to disable MSI in magento 2? (Ver. 2.3.4) / Learn Magento 2 Adobe Commerce / By Saphal Add below code on composer : JSON"replace": { "magento/module-inventory": "*", "magento/module-inventory-admin-ui": "*", "magento/module-inventory-api": "*", "magento/module-inventory-bundle-product": "*", "magento/module-inventory-bundle-product-admin-ui": "*", "magento/module-inventory-cache": "*", "magento/module-inventory-catalog": "*", "magento/module-inventory-catalog-admin-ui": "*", "magento/module-inventory-catalog-api": "*", "magento/module-inventory-catalog-search": "*", "magento/module-inventory-configurable-product": "*", "magento/module-inventory-configurable-product-admin-ui": "*", "magento/module-inventory-configurable-product-indexer": "*", "magento/module-inventory-configuration": "*", "magento/module-inventory-configuration-api": "*", "magento/module-inventory-distance-based-source-selection": "*", "magento/module-inventory-distance-based-source-selection-admin-ui": "*", "magento/module-inventory-distance-based-source-selection-api": "*", "magento/module-inventory-elasticsearch": "*", "magento/module-inventory-grouped-product": "*", "magento/module-inventory-grouped-product-admin-ui": "*", "magento/module-inventory-grouped-product-indexer": "*", "magento/module-inventory-import-export": "*", "magento/module-inventory-indexer": "*", "magento/module-inventory-low-quantity-notification": "*", "magento/module-inventory-low-quantity-notification-admin-ui": "*", "magento/module-inventory-low-quantity-notification-api": "*", "magento/module-inventory-multi-dimensional-indexer-api": "*", "magento/module-inventory-product-alert": "*", "magento/module-inventory-reservations": "*", "magento/module-inventory-reservations-api": "*", "magento/module-inventory-sales": "*", "magento/module-inventory-sales-admin-ui": "*", "magento/module-inventory-sales-api": "*", "magento/module-inventory-sales-frontend-ui": "*", "magento/module-inventory-setup-fixture-generator": "*", "magento/module-inventory-shipping": "*", "magento/module-inventory-shipping-admin-ui": "*", "magento/module-inventory-source-deduction-api": "*", "magento/module-inventory-source-selection": "*", "magento/module-inventory-source-selection-api": "*", "magento/module-inventory-export-stock": "*", "magento/module-inventory-export-stock-api": "*", "magento/module-inventory-reservation-cli": "*", "magento/module-inventory-graph-ql": "*", "magento/google-shopping-ads" : "*", "magento/module-inventory-advanced-checkout" : "*", "magento/module-inventory-requisition-list" : "*" }Then run composer update