diff --git a/cameleer3-server-app/src/main/resources/clickhouse/V1__agent_metrics.sql b/cameleer3-server-app/src/main/resources/clickhouse/V1__agent_metrics.sql
index 807e882c..b1e620eb 100644
--- a/cameleer3-server-app/src/main/resources/clickhouse/V1__agent_metrics.sql
+++ b/cameleer3-server-app/src/main/resources/clickhouse/V1__agent_metrics.sql
@@ -10,5 +10,5 @@ CREATE TABLE IF NOT EXISTS agent_metrics (
 ENGINE = MergeTree()
 PARTITION BY (tenant_id, toYYYYMM(collected_at))
 ORDER BY (tenant_id, agent_id, metric_name, collected_at)
-TTL collected_at + INTERVAL 365 DAY DELETE
+TTL toDateTime(collected_at) + INTERVAL 365 DAY DELETE
 SETTINGS index_granularity = 8192;