diff --git a/proto/internal/buf.yaml b/proto/internal/buf.yaml
index 79879e6cb2..c1078f6504 100644
--- a/proto/internal/buf.yaml
+++ b/proto/internal/buf.yaml
@@ -9,12 +9,6 @@ deps:
 breaking:
   use:
     - WIRE
-  # Uncomment this to temporarily ignore specific files or directories:
-  ignore:
-    # example: - temporal/server/api/.../message.proto
-    # TODO: Remove once this is stable. business_id was intentionally changed from
-    # optional to repeated to support multiple fallback routing fields.
-    - temporal/server/api/routing/v1/extension.proto
 lint:
   use:
     - DEFAULT