diff --git a/RELEASE_NOTES_v2.2.82.md b/RELEASE_NOTES_v2.2.82.md
new file mode 100644
index 0000000..5b6d008
--- /dev/null
+++ b/RELEASE_NOTES_v2.2.82.md
@@ -0,0 +1,21 @@
+# Release Notes v2.2.82
+
+Dato: 2026-05-04
+
+## Hotfix
+
+- `updateto.sh` fjerner nu automatisk `STACK_NAME` fra `.env` inden startup.
+- `updateto.sh` vaelger automatisk `STACK_NAME=v2` i `/srv/podman/bmc_hub_v2` (ellers `prod`).
+
+## Hvorfor
+
+Nogle prod-deployments crashede API ved startup med:
+
+- `ValidationError: STACK_NAME Extra inputs are not permitted`
+
+Aarsagen var, at `STACK_NAME` laa i `.env` og blev indlaest af FastAPI Settings.
+
+## Berort fil
+
+- `updateto.sh`
+- `VERSION`
diff --git a/VERSION b/VERSION
index 4a3f268..c08f469 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.2.81
+2.2.82
diff --git a/updateto.sh b/updateto.sh
index 4637817..383f2d9 100755
--- a/updateto.sh
+++ b/updateto.sh
@@ -17,9 +17,6 @@ if [ "${EUID:-$(id -u)}" -eq 0 ]; then
 fi
 
 PODMAN_COMPOSE_FILE="docker-compose.prod.yml"
-STACK_NAME="${STACK_NAME:-prod}"
-POSTGRES_CONTAINER="bmc-hub-postgres-${STACK_NAME}"
-API_CONTAINER="bmc-hub-api-${STACK_NAME}"
 
 if [ -z "$VERSION" ]; then
     echo "❌ Fejl: Ingen version angivet"
@@ -30,6 +27,10 @@ fi
 # SAFETY CHECK: Verify we're on production server
 CURRENT_IP=$(hostname -I | awk '{print $1}' 2>/dev/null || echo "unknown")
 CURRENT_DIR=$(pwd)
+DEFAULT_STACK_NAME="prod"
+if [ "$CURRENT_DIR" = "/srv/podman/bmc_hub_v2" ]; then
+    DEFAULT_STACK_NAME="v2"
+fi
 
 if [[ "$CURRENT_IP" != "172.16.31.183" ]] && [[ "$CURRENT_DIR" != "/srv/podman/bmc_hub_v2" ]]; then
     echo "⚠️  ADVARSEL: Dette script skal kun køres på PRODUCTION serveren!"
@@ -60,11 +61,22 @@ if [ ! -f "$PODMAN_COMPOSE_FILE" ]; then
     exit 1
 fi
 
+# STACK_NAME must NOT live in .env because FastAPI Settings rejects unknown keys.
+# Keep stack selection as shell/env only.
+if grep -q '^STACK_NAME=' .env; then
+    echo "⚠️  Fjerner STACK_NAME fra .env (forhindrer API crash i Settings loader)..."
+    sed -i.bak '/^STACK_NAME=/d' .env
+fi
+
 # Load environment variables (DB credentials)
 set -a
 source .env
 set +a
 
+STACK_NAME="${STACK_NAME:-$DEFAULT_STACK_NAME}"
+POSTGRES_CONTAINER="bmc-hub-postgres-${STACK_NAME}"
+API_CONTAINER="bmc-hub-api-${STACK_NAME}"
+
 if [ -z "${API_PORT:-}" ]; then
     if [ "$CURRENT_DIR" = "/srv/podman/bmc_hub_v2" ]; then
         API_PORT="8001"