docs: added a troubleshooting guide for updates (#3057)

docs/content/troubleshooting/errors-after-update.md

@@ -0,0 +1,17 @@
+# Errors After Update
+
+If you run into errors after updating Medusa and its dependencies, it's highly recommended to check the [Upgrade Guides](../advanced/backend/upgrade-guides/index.mdx) if there is a specific guide for your version. These guides include steps required to perform after upgrading Medusa.
+
+If there's no upgrade guide for your version, make sure that you ran the `migrations` command in the root directory of your Medusa server:
+
+```bash
+medusa migrations run
+```
+
+This ensures your server has the latest database structure required. Then, try running your Medusa server again and check whether the same error occurs.
+
+---
+
+## See Also
+
+- [Migrations](../advanced/backend/migrations/index.md)

www/docs/sidebars.js

@@ -693,6 +693,11 @@ module.exports = {
           id: "troubleshooting/common-installation-errors",
           label: "Installation Errors",
         },
+        {
+          type: "doc",
+          id: "troubleshooting/errors-after-update",
+          label: "Errors After Update",
+        },
         {
           type: "doc",
           id: "troubleshooting/database-error",