diff --git a/installer/install.sh b/installer/install.sh
index 59a8633..8586d31 100644
--- a/installer/install.sh
+++ b/installer/install.sh
@@ -1406,8 +1406,9 @@ handle_rerun() {
   case "$RERUN_ACTION" in
     upgrade)
       log_info "Upgrading installation..."
-      load_config_file "$INSTALL_DIR/cameleer.conf"
-      load_env_overrides
+      # Config already loaded by detect_existing_install + load_env_overrides in main.
+      # Calling load_config_file again with set -e causes silent exit because
+      # [ -z "$VAR" ] && VAR="$value" returns 1 for every already-set variable.
       merge_config
       copy_templates
       docker_registry_login