Don't update caches replication stream if tokens haven't advanced

1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/replication/resource.py b/synapse/replication/resource.py

index 84993b33b3..0996054f6b 100644
--- a/synapse/replication/resource.py
+++ b/synapse/replication/resource.py
@@ -390,7 +390,7 @@ class ReplicationResource(Resource):
 
         caches = request_streams.get("caches")
 
-        if caches is not None:
+        if caches is not None and current_position != caches:
             updated_caches = yield self.store.get_all_updated_caches(
                 caches, current_position, limit
             )