diff --git a/install/prepare_site_init.md b/install/prepare_site_init.md
index b58180868151..4c86f30f72e6 100644
--- a/install/prepare_site_init.md
+++ b/install/prepare_site_init.md
@@ -238,6 +238,13 @@ with system-specific customizations.
             -keystore /data/certs.jks -storepass password -noprompt
     ```
 
+    > **`NOTE`** If the command is executed multiple times by oversight, then the console will display the following and may be ignored
+    > to proceed further.
+
+    ```text
+    keytool error: java.lang.Exception: Certificate not imported, alias <cray-data-center-ca> already exists
+    ```
+
 1. (`pit#`) Create `certs.jks.b64` by base-64 encoding `certs.jks`.
 
     ```bash