diff --git a/deploy/single/all-in-one-postgres-enterprise.yaml b/deploy/single/all-in-one-postgres-enterprise.yaml
index f2d551eebc..7039b6313e 100644
--- a/deploy/single/all-in-one-postgres-enterprise.yaml
+++ b/deploy/single/all-in-one-postgres-enterprise.yaml
@@ -2112,6 +2112,8 @@ spec:
           value: '{"cookie_secure":false,"storage":"kong","cookie_name":"admin_session","cookie_lifetime":31557600,"cookie_samesite":"off","secret":"please-change-me"}'
         - name: KONG_ADMIN_LISTEN
           value: 0.0.0.0:8001, 0.0.0.0:8444 ssl
+        - name: KONG_ROUTER_FLAVOR
+          value: traditional_compatible
         - name: KONG_DATABASE
           value: postgres
         - name: KONG_PG_HOST
@@ -2135,8 +2137,6 @@ spec:
           value: /dev/stderr
         - name: KONG_PROXY_ERROR_LOG
           value: /dev/stderr
-        - name: KONG_ROUTER_FLAVOR
-          value: expressions
         image: kong/kong-gateway:3.4
         lifecycle:
           preStop:
diff --git a/deploy/single/all-in-one-postgres.yaml b/deploy/single/all-in-one-postgres.yaml
index b0487cf184..9bb70d7547 100644
--- a/deploy/single/all-in-one-postgres.yaml
+++ b/deploy/single/all-in-one-postgres.yaml
@@ -2065,6 +2065,8 @@ spec:
       automountServiceAccountToken: false
       containers:
       - env:
+        - name: KONG_ROUTER_FLAVOR
+          value: traditional_compatible
         - name: KONG_DATABASE
           value: postgres
         - name: KONG_PG_HOST
@@ -2090,8 +2092,6 @@ spec:
           value: /dev/stderr
         - name: KONG_PROXY_ERROR_LOG
           value: /dev/stderr
-        - name: KONG_ROUTER_FLAVOR
-          value: expressions
         image: kong:3.4
         lifecycle:
           preStop: