diff --git a/src/libs/antares/study/runtime/runtime.cpp b/src/libs/antares/study/runtime/runtime.cpp
index 3309ebadc4..753b73a976 100644
--- a/src/libs/antares/study/runtime/runtime.cpp
+++ b/src/libs/antares/study/runtime/runtime.cpp
@@ -246,19 +246,12 @@ void StudyRuntimeInfos::initializeRangeLimits(const Study& study, StudyRangeLimi
 }
 
 StudyRuntimeInfos::StudyRuntimeInfos(uint nbYearsParallel) :
- nbYears(0),
- parameters(nullptr),
- timeseriesNumberYear(nullptr),
- thermalPlantTotalCount(0),
- thermalPlantTotalCountMustRun(0),
- quadraticOptimizationHasFailed(false)
+    nbYears(0),
+    parameters(nullptr),
+    thermalPlantTotalCount(0),
+    thermalPlantTotalCountMustRun(0),
+    quadraticOptimizationHasFailed(false)
 {
-    // Evite les confusions de numeros de TS entre AMC
-    timeseriesNumberYear = new uint[nbYearsParallel];
-    for (uint numSpace = 0; numSpace < nbYearsParallel; numSpace++)
-    {
-        timeseriesNumberYear[numSpace] = 999999;
-    }
 }
 
 void StudyRuntimeInfos::checkThermalTSGeneration(Study& study)
@@ -447,8 +440,6 @@ void StudyRuntimeInfos::removeAllRenewableClustersFromSolverComputations(Study&
 StudyRuntimeInfos::~StudyRuntimeInfos()
 {
     logs.debug() << "Releasing runtime data";
-
-    delete[] timeseriesNumberYear;
 }
 
 #ifndef NDEBUG
diff --git a/src/libs/antares/study/runtime/runtime.h b/src/libs/antares/study/runtime/runtime.h
index 0b65f52d1a..f8aba658f3 100644
--- a/src/libs/antares/study/runtime/runtime.h
+++ b/src/libs/antares/study/runtime/runtime.h
@@ -109,14 +109,6 @@ class StudyRuntimeInfos
     //! Random numbers generators
     MersenneTwister random[seedMax];
 
-    /*!
-    ** \brief The index to use when retrieving the time-series numbers
-    **
-    ** To allow the drop of the years with no solution, we can not fully rely
-    ** on the current year. So we have to maintain a rotating index (0..nbYears)
-    */
-    uint* timeseriesNumberYear;
-
     //! Total
     uint thermalPlantTotalCount;
     uint thermalPlantTotalCountMustRun;
diff --git a/src/solver/aleatoire/alea_fonctions.h b/src/solver/aleatoire/alea_fonctions.h
index 33f1c10ccc..e54d825358 100644
--- a/src/solver/aleatoire/alea_fonctions.h
+++ b/src/solver/aleatoire/alea_fonctions.h
@@ -30,4 +30,5 @@
 #include "antares/study/study.h"
 
 void ApplyRandomTSnumbers(const Antares::Data::Study& study,
+                          unsigned int year,
                           uint numSpace);
\ No newline at end of file
diff --git a/src/solver/aleatoire/alea_tirage_au_sort_chroniques.cpp b/src/solver/aleatoire/alea_tirage_au_sort_chroniques.cpp
index 04acdb83b5..b39a83fd76 100644
--- a/src/solver/aleatoire/alea_tirage_au_sort_chroniques.cpp
+++ b/src/solver/aleatoire/alea_tirage_au_sort_chroniques.cpp
@@ -34,12 +34,9 @@ using namespace Antares;
 using namespace Antares::Data;
 
 void ApplyRandomTSnumbers(const Study& study,
+                          unsigned int year,
                           uint numSpace)
 {
-    auto& runtime = *study.runtime;
-
-    uint year = runtime.timeseriesNumberYear[numSpace];
-
     // each area
     const unsigned int count = study.areas.size();
     for (unsigned int areaIndex = 0; areaIndex != count; ++areaIndex)
@@ -126,9 +123,9 @@ void ApplyRandomTSnumbers(const Study& study,
     // Transmission capacities
     // ------------------------------
     // each link
-    for (unsigned int linkIndex = 0; linkIndex < runtime.interconnectionsCount(); ++linkIndex)
+    for (unsigned int linkIndex = 0; linkIndex < study.runtime->interconnectionsCount(); ++linkIndex)
     {
-        AreaLink* link = runtime.areaLink[linkIndex];
+        AreaLink* link = study.runtime->areaLink[linkIndex];
         assert(year < link->timeseriesNumbers.height);
         NUMERO_CHRONIQUES_TIREES_PAR_INTERCONNEXION& ptchro
           = NumeroChroniquesTireesParInterconnexion[numSpace][linkIndex];
diff --git a/src/solver/simulation/solver.hxx b/src/solver/simulation/solver.hxx
index 434ffb349e..39db8e13ce 100644
--- a/src/solver/simulation/solver.hxx
+++ b/src/solver/simulation/solver.hxx
@@ -152,7 +152,7 @@ private:
 
             // 2 - Preparing the Time-series numbers
             // We want to draw lots of numbers for time-series
-            ApplyRandomTSnumbers(study, numSpace);
+            ApplyRandomTSnumbers(study, y, numSpace);
 
             // 3 - Preparing data related to Clusters in 'must-run' mode
             simulation_->prepareClustersInMustRunMode(numSpace);
@@ -980,7 +980,6 @@ void ISimulation<Impl>::loopThroughYears(uint firstYear,
             {
                 yearPerformed = true;
                 numSpace = set_it->performedYearToSpace[y];
-                study.runtime->timeseriesNumberYear[numSpace] = y;
             }
 
             // If the year has not to be rerun, we skip the computation of the year.