diff --git a/docker-compose.yml b/docker-compose.yml
index 054f44f..bfb3204 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -24,6 +24,8 @@ services:
       - REDIS_HOST=${REDIS_HOST:-redis}
       - REDIS_PORT=${REDIS_PORT:-6379}
       - REDIS_PASSWORD=${REDIS_PASSWORD:-}
+      # Índice de DB Redis para aislar sesiones entre despliegues (0-15)
+      - REDIS_DB=${REDIS_DB:-0}
       - WHATSAPP_TOKEN=${WHATSAPP_TOKEN}
       - WHATSAPP_PHONE_NUMBER_ID=${WHATSAPP_PHONE_NUMBER_ID}
       - WEBHOOK_VERIFY_TOKEN=${WEBHOOK_VERIFY_TOKEN}
diff --git a/docker/php/php.ini b/docker/php/php.ini
index 0406c72..c25b026 100644
--- a/docker/php/php.ini
+++ b/docker/php/php.ini
@@ -27,8 +27,10 @@ disable_functions =
 curl.cainfo = /etc/ssl/certs/ca-certificates.crt
 
 ; Session — usar variables de entorno para Redis (Coolify las inyecta)
+; REDIS_DB separa las sesiones por despliegue (Redis tiene DBs 0-15).
+; Despliegue A: REDIS_DB=0 (default).  Despliegue B: REDIS_DB=1.
 session.save_handler = redis
-session.save_path = "tcp://${REDIS_HOST}:${REDIS_PORT}?auth=${REDIS_PASSWORD}"
+session.save_path = "tcp://${REDIS_HOST}:${REDIS_PORT}?auth=${REDIS_PASSWORD}&database=${REDIS_DB}"
 session.gc_maxlifetime = 3600
 session.cookie_httponly = 1
 session.use_strict_mode = 1