few tweaks

lib/redirects/permalinks.js

@@ -41,6 +41,7 @@ module.exports = function generateRedirectsForPermalinks (permalinks, redirectFr
 
       // add it to the redirects object
       redirects[versionedFrontmatterOldPath] = permalink.href
+      redirects[`/en${versionedFrontmatterOldPath}`] = permalink.href
 
       // then get an array of possible alternative old paths from the current versioned old path
       const possibleOldPathsForVersionedOldPaths = getOldPathsFromPermalink(versionedFrontmatterOldPath, permalink.languageCode, permalink.pageVersion)

lib/site-tree.js

@@ -3,7 +3,7 @@ const products = Object.values(require('./all-products'))
 const languageCodes = Object.keys(require('./languages'))
 const addTitlesToTree = require('./site-tree-titles')
 const allVersions = Object.keys(require('./all-versions'))
-const { getVersionStringFromPath } = require('./path-utils')
+const { getPathWithoutVersion } = require('./path-utils')
 const getApplicableVersions = require('./get-applicable-versions')
 const findPage = require('./find-page')
 
@@ -46,8 +46,7 @@ module.exports = async function buildSiteTree (pageMap, site, redirects) {
         if (!getApplicableVersions(page.versions).includes(version)) return
 
         // item.hrefs have a default version via lib/all-products, so update to the current version
-        const versionFromPath = getVersionStringFromPath(item.href)
-        const versionedProductHref = path.join('/', languageCode, item.href.replace(versionFromPath, version))
+        const versionedProductHref = path.join('/', languageCode, version, getPathWithoutVersion(item.href))
 
         product.categories = buildCategoriesTree(page.tocItems, versionedProductHref, pageMap, redirects, version)