--- a/mod_storage_xmlarchive/README.markdown	Wed Jan 23 15:37:56 2019 +0100
+++ b/mod_storage_xmlarchive/README.markdown	Thu Jan 24 13:39:33 2019 +0100
@@ -69,6 +69,12 @@
 for MAM and `muc_log` for MUC logs. Finally, `$JID` is the JID of the
 user or MUC room to be migrated, which can be repeated.
 
+::: {.alert .alert-danger}
+Since this is a destructive command, don't forget to backup your data
+first.
+:::
+
+
 Data structure
 ==============