--- title: Manually setting up negative inventory on Lightspeed R-Series description: Negative inventory allows your stock quantities to dip into the negative when items are oversold or oversent on transfers and vendor returns, however, if only one of your integrations has that enabled, it can cause issues with your sync when stock dips below zero. --- [Skip to content](https://knowledgebase.skuiq.com/knowledge/manually-disabling-negative-inventory-on-lightspeed-series-r#main-content) English Show submenu for translations ![skuIQ\_logo gradient.png\]](https://knowledgebase.skuiq.com/hs-fs/hubfs/skuIQ_logo%20gradient.png?height=40&name=skuIQ_logo%20gradient.png) Open main navigation Close main navigation - English Show submenu for translations - Go to skuiq.com Go to skuiq.com Welcome to the Knowledge Base! - There are no suggestions because the search field is empty. 1. [Help Center](https://knowledgebase.skuiq.com/knowledge?hsLang=en) 2. [Get Started with SKU IQ](https://knowledgebase.skuiq.com/knowledge/get-started-with-sku-iq?hsLang=en) 3. [Enabling Inventory Tracking](https://knowledgebase.skuiq.com/knowledge/get-started-with-sku-iq?hsLang=en#enabling-inventory-tracking) # Manually setting up negative inventory on Lightspeed R-Series ## Negative inventory allows your stock quantities to dip into the negative when items are oversold or oversent on transfers and vendor returns, however, if only one of your integrations has that enabled, it can cause issues with your sync when stock dips below zero. ### Step-by-step Guide 1\. On your Lighstpeed R-Series dashboard, navigate  to the '***Settings***' tab. ![Manually disabling negative inventory on Lightspeed R-Series 1](https://knowledgebase.skuiq.com/hs-fs/hubfs/Knowledge%20Base%20Import/Manually%20disabling%20negative%20inventory%20on%20Lightspeed%20R-Series/Manually%20disabling%20negative%20inventory%20on%20Lightspeed%20R-Series%201.png?width=238&height=579&name=Manually%20disabling%20negative%20inventory%20on%20Lightspeed%20R-Series%201.png) 2\. Under '***Advanced Setup'***, click on ***'Optional Modules'***. ![Manually disabling negative inventory on Lightspeed R-Series 2](https://knowledgebase.skuiq.com/hs-fs/hubfs/Knowledge%20Base%20Import/Manually%20disabling%20negative%20inventory%20on%20Lightspeed%20R-Series/Manually%20disabling%20negative%20inventory%20on%20Lightspeed%20R-Series%202.png?width=670&height=453&name=Manually%20disabling%20negative%20inventory%20on%20Lightspeed%20R-Series%202.png) 3.On this page, look for ***'Negative Inventory'*** and disable the toggle to turn off this feature. ![Manually disabling negative inventory on Lightspeed R-Series 3](https://knowledgebase.skuiq.com/hs-fs/hubfs/Knowledge%20Base%20Import/Manually%20disabling%20negative%20inventory%20on%20Lightspeed%20R-Series/Manually%20disabling%20negative%20inventory%20on%20Lightspeed%20R-Series%203.png?width=670&height=345&name=Manually%20disabling%20negative%20inventory%20on%20Lightspeed%20R-Series%203.png) ⚠️ SKU IQ only recommends enableing Negative Stock if you have it enabled for both POS and eCommerce, having it enabled for only one of your platforms can cause issues with the stock once numbers drop below zero. 4.Once you have your selection made, click on '***Save Changes***'  on the top of the page. ![Manually disabling negative inventory on Lightspeed R-Series 4](https://knowledgebase.skuiq.com/hs-fs/hubfs/Knowledge%20Base%20Import/Manually%20disabling%20negative%20inventory%20on%20Lightspeed%20R-Series/Manually%20disabling%20negative%20inventory%20on%20Lightspeed%20R-Series%204.png?width=670&height=336&name=Manually%20disabling%20negative%20inventory%20on%20Lightspeed%20R-Series%204.png)   - 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