diff --git a/dhp-workflows/dhp-actionmanager/src/main/java/eu/dnetlib/dhp/actionmanager/promote/PromoteActionPayloadFunctions.java b/dhp-workflows/dhp-actionmanager/src/main/java/eu/dnetlib/dhp/actionmanager/promote/PromoteActionPayloadFunctions.java
index 56c8dd05a..c0192cddb 100644
--- a/dhp-workflows/dhp-actionmanager/src/main/java/eu/dnetlib/dhp/actionmanager/promote/PromoteActionPayloadFunctions.java
+++ b/dhp-workflows/dhp-actionmanager/src/main/java/eu/dnetlib/dhp/actionmanager/promote/PromoteActionPayloadFunctions.java
@@ -111,7 +111,9 @@ public class PromoteActionPayloadFunctions {
 		SerializableSupplier<Function<G, Boolean>> isNotZeroFn,
 		Class<G> rowClazz) {
 		TypedColumn<G, G> aggregator = new TableAggregator<>(zeroFn, mergeAndGetFn, isNotZeroFn, rowClazz).toColumn();
+
 		return rowDS
+			.filter((FilterFunction<G>) o -> isNotZeroFn.get().apply(o))
 			.groupByKey((MapFunction<G, String>) x -> rowIdFn.get().apply(x), Encoders.STRING())
 			.agg(aggregator)
 			.map((MapFunction<Tuple2<String, G>, G>) Tuple2::_2, Encoders.kryo(rowClazz));