diff --git a/src/libs/antares/study/parts/common/cluster_list.cpp b/src/libs/antares/study/parts/common/cluster_list.cpp
index bc5f8e5aa5..f73ae6bac0 100644
--- a/src/libs/antares/study/parts/common/cluster_list.cpp
+++ b/src/libs/antares/study/parts/common/cluster_list.cpp
@@ -80,7 +80,7 @@ void ClusterList<ClusterT>::clear()
 template<class ClusterT>
 void ClusterList<ClusterT>::resizeAllTimeseriesNumbers(uint n)
 {
-    each([&](Cluster& cluster) { cluster.series.timeseriesNumbers.resize(1, n); });
+    each([&](Cluster& cluster) { cluster.series.timeseriesNumbers.reset(1, n); });
 }
 
 #define SEP IO::Separator