diff --git a/gitlab/hooks/pre-start b/gitlab/hooks/pre-start
index 6289e604..8518428a 100755
--- a/gitlab/hooks/pre-start
+++ b/gitlab/hooks/pre-start
@@ -32,7 +32,7 @@ VERSIONS+=("18.5.1")
 VERSIONS+=("18.6.2")
 VERSIONS+=("18.7.4")
 VERSIONS+=("18.8.4")
-VERSIONs+=("18.9.3")
+VERSIONS+=("18.9.3")
 VERSIONS+=("18.10.1")
 
 # List of images on migration path
@@ -167,6 +167,12 @@ if [[ "${VERSIONS[-1]}" == "${current_version}" ]]; then
 	exit
 fi
 
+# Guard against migration logic bugs due to version/image list drift.
+if [[ "${#VERSIONS[@]}" -ne "${#IMAGES[@]}" ]]; then
+	echo "Migration configuration error: VERSIONS (${#VERSIONS[@]}) and IMAGES (${#IMAGES[@]}) length mismatch."
+	exit 1
+fi
+
 # Loop through versions, ignoring past versions
 for i in "${!VERSIONS[@]}"; do
 	[[ "${i}" -le "${active_version_idx}" ]] && continue
diff --git a/gitlab/umbrel-app.yml b/gitlab/umbrel-app.yml
index 7bf51cc3..fbf7115d 100644
--- a/gitlab/umbrel-app.yml
+++ b/gitlab/umbrel-app.yml
@@ -3,7 +3,7 @@ id: gitlab
 name: GitLab
 tagline: Software. Faster.
 category: developer
-version: "18.10.1"
+version: "18.10.1-1"
 port: 8929
 description: >-
   ⚠️ This app is RAM-intensive (+6GB recommended) and can take 15-20 minutes to start after installation on low-powered devices.