diff --git a/.changeset/mighty-geckos-kiss.md b/.changeset/mighty-geckos-kiss.md
new file mode 100644
index 0000000000..0761d8b257
--- /dev/null
+++ b/.changeset/mighty-geckos-kiss.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-techdocs-node': patch
+---
+
+Update `patchMkdocsYmlPrebuild` to modify `repo_url` and `edit_uri` independently.
diff --git a/plugins/techdocs-node/src/stages/generate/mkdocsPatchers.ts b/plugins/techdocs-node/src/stages/generate/mkdocsPatchers.ts
index 762a1c267a..fb95c19a9c 100644
--- a/plugins/techdocs-node/src/stages/generate/mkdocsPatchers.ts
+++ b/plugins/techdocs-node/src/stages/generate/mkdocsPatchers.ts
@@ -108,7 +108,7 @@ export const patchMkdocsYmlPreBuild = async (
   scmIntegrations: ScmIntegrationRegistry,
 ) => {
   await patchMkdocsFile(mkdocsYmlPath, logger, mkdocsYml => {
-    if (!('repo_url' in mkdocsYml) && !('edit_uri' in mkdocsYml)) {
+    if (!('repo_url' in mkdocsYml) || !('edit_uri' in mkdocsYml)) {
       // Add edit_uri and/or repo_url to mkdocs.yml if it is missing.
       // This will enable the Page edit button generated by MkDocs.
       // If the either has been set, keep the original value
@@ -119,8 +119,8 @@ export const patchMkdocsYmlPreBuild = async (
       );
 
       if (result.repo_url || result.edit_uri) {
-        mkdocsYml.repo_url = result.repo_url;
-        mkdocsYml.edit_uri = result.edit_uri;
+        mkdocsYml.repo_url = mkdocsYml.repo_url || result.repo_url;
+        mkdocsYml.edit_uri = mkdocsYml.edit_uri || result.edit_uri;
 
         logger.info(
           `Set ${JSON.stringify(