diff --git a/db/knex_migrations/2024-10-31-0000-fix-snmp-monitor.js b/db/knex_migrations/2024-10-31-0000-fix-snmp-monitor.js
index bbd8ab859..94a3ac680 100644
--- a/db/knex_migrations/2024-10-31-0000-fix-snmp-monitor.js
+++ b/db/knex_migrations/2024-10-31-0000-fix-snmp-monitor.js
@@ -1,4 +1,7 @@
 exports.up = function (knex) {
     return knex('monitor').whereNull('json_path_operator').update('json_path_operator', '==');
 };
-exports.down = function (knex) {};
+exports.down = function (knex) {
+    // changing the json_path_operator back to null for all '==' is not possible anymore
+    // we have lost the context which fields have been set explicitely in >= v2.0 and which would need to be reverted
+};