diff --git a/internal/api/backresthandler.go b/internal/api/backresthandler.go
index ae53a721..749ca6b1 100644
--- a/internal/api/backresthandler.go
+++ b/internal/api/backresthandler.go
@@ -9,6 +9,7 @@ import (
 	"os"
 	"path"
 	"reflect"
+	"slices"
 	"time"
 
 	"connectrpc.com/connect"
@@ -99,8 +100,15 @@ func (s *BackrestHandler) AddRepo(ctx context.Context, req *connect.Request[v1.R
 		return nil, fmt.Errorf("failed to get config: %w", err)
 	}
 
+	// Deep copy the configuration
 	c = proto.Clone(c).(*v1.Config)
-	c.Repos = append(c.Repos, req.Msg)
+
+	// Add or implicit update the repo
+	if idx := slices.IndexFunc(c.Repos, func(r *v1.Repo) bool { return r.Id == req.Msg.Id }); idx != -1 {
+		c.Repos[idx] = req.Msg
+	} else {
+		c.Repos = append(c.Repos, req.Msg)
+	}
 
 	if err := config.ValidateConfig(c); err != nil {
 		return nil, fmt.Errorf("validation error: %w", err)
diff --git a/webui/src/views/AddRepoModal.tsx b/webui/src/views/AddRepoModal.tsx
index 1dcf1f2b..f62b2ded 100644
--- a/webui/src/views/AddRepoModal.tsx
+++ b/webui/src/views/AddRepoModal.tsx
@@ -106,15 +106,8 @@ export const AddRepoModal = ({ template }: { template: Repo | null }) => {
       });
 
       if (template !== null) {
-        const configCopy = config.clone();
-        // We are in the edit repo flow, update the repo in the config
-        const idx = configCopy.repos!.findIndex((r) => r.id === template!.id);
-        if (idx === -1) {
-          alertsApi.error("Can't update repo, not found");
-          return;
-        }
-        configCopy.repos![idx] = repo;
-        setConfig(await backrestService.setConfig(configCopy));
+        // We are in the update repo flow, update the repo via the service
+        setConfig(await backrestService.addRepo(repo));
         showModal(null);
         alertsApi.success("Updated repo configuration " + repo.uri);
       } else {