addressed comment

Author: hcharlie1201

clickhouse/migrations/schema_46_tags.sql

@@ -4,7 +4,7 @@ CREATE TABLE IF NOT EXISTS default.tags (
     entity_id String,
     tag String,
     created_at DateTime DEFAULT now(),
-    PRIMARY KEY (organization_id, entity_type, entity_id, tag)
+    PRIMARY KEY (organization_id, entity_type)
 ) ENGINE = ReplacingMergeTree()
 ORDER BY (organization_id, entity_type, entity_id, tag);