diff --git a/core/common/util/src/main/java/io/openk9/common/util/ShardingKey.java b/core/common/util/src/main/java/io/openk9/common/util/ShardingKey.java
index a634a4797..728ab9c88 100644
--- a/core/common/util/src/main/java/io/openk9/common/util/ShardingKey.java
+++ b/core/common/util/src/main/java/io/openk9/common/util/ShardingKey.java
@@ -22,7 +22,7 @@
 
 public record ShardingKey(String... elements) {
 
-	private static final char SEPARATOR = '_';
+	private static final char SEPARATOR = '#';
 
 	public ShardingKey {
 		assert elements.length >= 2 : "Must have at least 2 elements (tenantId, scheduleId)";