diff --git a/PWGCF/EbyEFluctuations/Tasks/partNumFluc.cxx b/PWGCF/EbyEFluctuations/Tasks/partNumFluc.cxx
index 5f2ee67ac07..d797a29b592 100644
--- a/PWGCF/EbyEFluctuations/Tasks/partNumFluc.cxx
+++ b/PWGCF/EbyEFluctuations/Tasks/partNumFluc.cxx
@@ -38,7 +38,6 @@
 #include <Framework/InitContext.h>
 #include <Framework/O2DatabasePDGPlugin.h>
 #include <Framework/OutputObjHeader.h>
-#include <Framework/StringHelpers.h>
 #include <Framework/runDataProcessing.h>
 
 #include <TFormula.h>
@@ -73,17 +72,8 @@
 #include <utility>
 #include <vector>
 
-#define C_CS(cs) /* NOLINT(cppcoreguidelines-macro-usage) */                                                            \
-  []<std::size_t... indices>(const std::index_sequence<indices...>&) constexpr noexcept -> ConstStr<(cs)[indices]...> { \
-    static_assert(std::is_array_v<std::remove_cvref_t<decltype(cs)>> &&                                                 \
-                  std::same_as<std::remove_extent_t<std::remove_cvref_t<decltype(cs)>>, char>);                         \
-    return ConstStr<(cs)[indices]...>{};                                                                                \
-  }(std::make_index_sequence<sizeof(cs) - 1>{})
-#define C_SV(sv) /* NOLINT(cppcoreguidelines-macro-usage) */                                                            \
-  []<std::size_t... indices>(const std::index_sequence<indices...>&) constexpr noexcept -> ConstStr<(sv)[indices]...> { \
-    static_assert(std::same_as<std::remove_cvref_t<decltype(sv)>, std::string_view>);                                   \
-    return ConstStr<(sv)[indices]...>{};                                                                                \
-  }(std::make_index_sequence<(sv).size()>{})
+#define C_CS(cs) HIST(cs) // NOLINT(cppcoreguidelines-macro-usage)
+#define C_SV(sv) HIST(sv) // NOLINT(cppcoreguidelines-macro-usage)
 
 using namespace o2;
 using namespace o2::framework;
diff --git a/PWGCF/Flow/Tasks/flowGfwOmegaXi.cxx b/PWGCF/Flow/Tasks/flowGfwOmegaXi.cxx
index 1f886490fcb..6802041b7e0 100644
--- a/PWGCF/Flow/Tasks/flowGfwOmegaXi.cxx
+++ b/PWGCF/Flow/Tasks/flowGfwOmegaXi.cxx
@@ -767,8 +767,9 @@ struct FlowGfwOmegaXi {
   }
 
   // input HIST("name")
-  template <char... chars>
-  void fillProfile(const GFW::CorrConfig& corrconf, const ConstStr<chars...>& tarName, const double& cent)
+  template <typename TName>
+    requires is_const_str<TName>::value
+  void fillProfile(const GFW::CorrConfig& corrconf, const TName& tarName, const double& cent)
   {
     double dnx, val;
     dnx = fGFW->Calculate(corrconf, 0, kTRUE).real();
@@ -799,8 +800,9 @@ struct FlowGfwOmegaXi {
     return;
   }
 
-  template <char... chars>
-  void fillProfilepT(const GFW::CorrConfig& corrconf, const ConstStr<chars...>& tarName, const int& ptbin, const double& cent)
+  template <typename TName>
+    requires is_const_str<TName>::value
+  void fillProfilepT(const GFW::CorrConfig& corrconf, const TName& tarName, const int& ptbin, const double& cent)
   {
     float dnx = 0;
     float val = 0;
@@ -814,8 +816,9 @@ struct FlowGfwOmegaXi {
     return;
   }
 
-  template <char... chars>
-  void fillProfilepTMC(const GFW::CorrConfig& corrconf, const ConstStr<chars...>& tarName, const int& ptbin, const int& PDGCode, const double& cent)
+  template <typename TName>
+    requires is_const_str<TName>::value
+  void fillProfilepTMC(const GFW::CorrConfig& corrconf, const TName& tarName, const int& ptbin, const int& PDGCode, const double& cent)
   {
     TAxis* fpt = nullptr;
     if (PDGCode == kXiMinus) {
@@ -843,8 +846,9 @@ struct FlowGfwOmegaXi {
   }
 
   // input HIST("name")
-  template <char... chars>
-  void fillProfilepTMass(const GFW::CorrConfig& corrconf, const ConstStr<chars...>& tarName, const int& ptbin, const int& PDGCode, const float& cent)
+  template <typename TName>
+    requires is_const_str<TName>::value
+  void fillProfilepTMass(const GFW::CorrConfig& corrconf, const TName& tarName, const int& ptbin, const int& PDGCode, const float& cent)
   {
     int nMassBins = 0;
     int nptbins = 0;
diff --git a/PWGCF/Flow/Tasks/flowGfwTask.cxx b/PWGCF/Flow/Tasks/flowGfwTask.cxx
index 3e43254956c..a0e5abdc8f0 100644
--- a/PWGCF/Flow/Tasks/flowGfwTask.cxx
+++ b/PWGCF/Flow/Tasks/flowGfwTask.cxx
@@ -646,8 +646,9 @@ struct FlowGfwTask {
 
   } // end of Initialization
 
-  template <char... chars>
-  void fillProfile(const GFW::CorrConfig& corrconf, const ConstStr<chars...>& tarName, const double& cent)
+  template <typename TName>
+    requires is_const_str<TName>::value
+  void fillProfile(const GFW::CorrConfig& corrconf, const TName& tarName, const double& cent)
   {
     double dnx, val;
     dnx = fGFW->Calculate(corrconf, 0, kTRUE).real();
diff --git a/PWGCF/Flow/Tasks/flowPbpbPikp.cxx b/PWGCF/Flow/Tasks/flowPbpbPikp.cxx
index 8abf37f3f09..b6052035985 100644
--- a/PWGCF/Flow/Tasks/flowPbpbPikp.cxx
+++ b/PWGCF/Flow/Tasks/flowPbpbPikp.cxx
@@ -601,8 +601,9 @@ struct FlowPbpbPikp {
     return pid + 1; // shift the pid by 1, 1 = pion, 2 = kaon, 3 = proton
   }
 
-  template <char... chars>
-  void fillProfile(const GFW::CorrConfig& corrconf, const ConstStr<chars...>& tarName, const double& cent)
+  template <typename TName>
+    requires is_const_str<TName>::value
+  void fillProfile(const GFW::CorrConfig& corrconf, const TName& tarName, const double& cent)
   {
     double dnx, val;
     if (!corrconf.pTDif) {
diff --git a/PWGCF/Flow/Tasks/flowPtEfficiency.cxx b/PWGCF/Flow/Tasks/flowPtEfficiency.cxx
index e22a4c36566..80cb37c6a13 100644
--- a/PWGCF/Flow/Tasks/flowPtEfficiency.cxx
+++ b/PWGCF/Flow/Tasks/flowPtEfficiency.cxx
@@ -271,8 +271,9 @@ struct FlowPtEfficiency {
       myTrackSel.SetMaxDcaZ(cfgCutDCAz);
   }
 
-  template <char... chars>
-  void fillProfile(GFW* fGFW, const GFW::CorrConfig& corrconf, const ConstStr<chars...>& tarName, const double& cent)
+  template <typename TName>
+    requires is_const_str<TName>::value
+  void fillProfile(GFW* fGFW, const GFW::CorrConfig& corrconf, const TName& tarName, const double& cent)
   {
     double dnx, val;
     dnx = fGFW->Calculate(corrconf, 0, kTRUE).real();
diff --git a/PWGCF/Flow/Tasks/flowQa.cxx b/PWGCF/Flow/Tasks/flowQa.cxx
index 2221f27a321..08c86f623c3 100644
--- a/PWGCF/Flow/Tasks/flowQa.cxx
+++ b/PWGCF/Flow/Tasks/flowQa.cxx
@@ -402,8 +402,9 @@ struct FlowQa {
     }
   }
 
-  template <char... chars>
-  void fillProfile(const GFW::CorrConfig& corrconf, const ConstStr<chars...>& tarName, const double& cent)
+  template <typename TName>
+    requires is_const_str<TName>::value
+  void fillProfile(const GFW::CorrConfig& corrconf, const TName& tarName, const double& cent)
   {
     double dnx, val;
     dnx = fGFW->Calculate(corrconf, 0, kTRUE).real();
diff --git a/PWGCF/Flow/Tasks/flowTask.cxx b/PWGCF/Flow/Tasks/flowTask.cxx
index 2471b77f282..fd24d4e2f32 100644
--- a/PWGCF/Flow/Tasks/flowTask.cxx
+++ b/PWGCF/Flow/Tasks/flowTask.cxx
@@ -837,8 +837,9 @@ struct FlowTask {
     th3sPerRun.insert(std::make_pair(runNumber, histPhiEtaVtxz));
   }
 
-  template <char... chars>
-  void fillProfile(const GFW::CorrConfig& corrconf, const ConstStr<chars...>& tarName, const double& cent)
+  template <typename TName>
+    requires is_const_str<TName>::value
+  void fillProfile(const GFW::CorrConfig& corrconf, const TName& tarName, const double& cent)
   {
     double dnx, val;
     dnx = fGFW->Calculate(corrconf, 0, kTRUE).real();
@@ -853,8 +854,9 @@ struct FlowTask {
     return;
   }
 
-  template <char... chars, char... chars2>
-  void fillpTvnProfile(const GFW::CorrConfig& corrconf, const double& sum_pt, const double& WeffEvent, const ConstStr<chars...>& vnWeff, const ConstStr<chars2...>& vnpT, const double& cent)
+  template <typename TName, typename TName2>
+    requires(is_const_str<TName>::value && is_const_str<TName2>::value)
+  void fillpTvnProfile(const GFW::CorrConfig& corrconf, const double& sum_pt, const double& WeffEvent, const TName& vnWeff, const TName2& vnpT, const double& cent)
   {
     double meanPt = sum_pt / WeffEvent;
     double dnx, val;
diff --git a/PWGCF/Flow/Tasks/pidFlowPtCorr.cxx b/PWGCF/Flow/Tasks/pidFlowPtCorr.cxx
index 5189ecd236d..d4c5bf7c3d7 100644
--- a/PWGCF/Flow/Tasks/pidFlowPtCorr.cxx
+++ b/PWGCF/Flow/Tasks/pidFlowPtCorr.cxx
@@ -2380,13 +2380,14 @@ struct PidFlowPtCorr {
   /**
    * @brief fill graphs like c22, c24, etc.
    *
-   * @tparam chars
+   * @tparam TName
    * @param corrconf
    * @param tarName graph name
    * @param cent
    */
-  template <char... chars>
-  void fillProfile(const GFW::CorrConfig& corrconf, const ConstStr<chars...>& tarName, const double& cent)
+  template <typename TName>
+    requires is_const_str<TName>::value
+  void fillProfile(const GFW::CorrConfig& corrconf, const TName& tarName, const double& cent)
   {
     // calculate #sum exp{i * 0 (#phi_{i} - #phi_{j})} == N_{pairs}
     // note that weight is ignored in the formula but not in the calculation, for c24 is similar
@@ -2453,7 +2454,7 @@ struct PidFlowPtCorr {
    * @note why we need weightedc22? when calculating cov(v2,pt), we need N_{pair} * N_{charged} to be weight
    *       NOTICE!!! when filling weighted, value gave to param ptSum is nch, when filling diffpt, its just ptsum
    *
-   * @tparam chars
+   * @tparam TName
    * @param corrconf
    * @param tarName
    * @param cent
@@ -2461,8 +2462,9 @@ struct PidFlowPtCorr {
    * @param nch
    * @param meanPt
    */
-  template <char... chars>
-  void fillProfilevnpt(const GFW::CorrConfig& corrconf, const ConstStr<chars...>& tarName, const double& cent, const double& ptSum, const double& nch, const double& meanPt = 0)
+  template <typename TName>
+    requires is_const_str<TName>::value
+  void fillProfilevnpt(const GFW::CorrConfig& corrconf, const TName& tarName, const double& cent, const double& ptSum, const double& nch, const double& meanPt = 0)
   {
     double dnx = 0.0, val = 0.0;
     dnx = fGFW->Calculate(corrconf, 0, true).real();
@@ -2475,8 +2477,9 @@ struct PidFlowPtCorr {
     }
   }
 
-  template <char... chars>
-  void fillProfilePOIvnpt(const GFW::CorrConfig& corrconf, const ConstStr<chars...>& tarName, const double& cent, const double& ptSum, const double& nch, const double& rndm)
+  template <typename TName>
+    requires is_const_str<TName>::value
+  void fillProfilePOIvnpt(const GFW::CorrConfig& corrconf, const TName& tarName, const double& cent, const double& ptSum, const double& nch, const double& rndm)
   {
     double dnx = 0.0, val = 0.0;
     dnx = fGFW->Calculate(corrconf, 0, true).real();
@@ -2496,8 +2499,9 @@ struct PidFlowPtCorr {
    *          counts are added before division. The PID mean pT is only the profile
    *          coordinate, so the profile is weighted by the combined pair count alone.
    */
-  template <char... chars>
-  void fillProfilePOIvnpt(const GFW::CorrConfig& corrconfA, const GFW::CorrConfig& corrconfB, const ConstStr<chars...>& tarName, const double& cent, const double& ptSum, const double& nPid, const double& rndm)
+  template <typename TName>
+    requires is_const_str<TName>::value
+  void fillProfilePOIvnpt(const GFW::CorrConfig& corrconfA, const GFW::CorrConfig& corrconfB, const TName& tarName, const double& cent, const double& ptSum, const double& nPid, const double& rndm)
   {
     const double dnxA = fGFW->Calculate(corrconfA, 0, true).real();
     const double dnxB = fGFW->Calculate(corrconfB, 0, true).real();
diff --git a/PWGCF/Flow/Tasks/resonancesGfwFlow.cxx b/PWGCF/Flow/Tasks/resonancesGfwFlow.cxx
index 9909d54112d..791cd36d014 100644
--- a/PWGCF/Flow/Tasks/resonancesGfwFlow.cxx
+++ b/PWGCF/Flow/Tasks/resonancesGfwFlow.cxx
@@ -921,8 +921,9 @@ struct ResonancesGfwFlow {
     return true;
   }
 
-  template <typename TTrack, typename vector, char... chars, typename TCollision>
-  void resurrectPhi(const TTrack& trackplus, const TTrack& trackminus, const TCollision& collision, vector plusdaug, vector minusdaug, vector mom, double plusmass, const ConstStr<chars...>& hist)
+  template <typename TTrack, typename vector, typename TName, typename TCollision>
+    requires is_const_str<TName>::value
+  void resurrectPhi(const TTrack& trackplus, const TTrack& trackminus, const TCollision& collision, vector plusdaug, vector minusdaug, vector mom, double plusmass, const TName& hist)
   {
     for (auto const& [partplus, partminus] : o2::soa::combinations(o2::soa::CombinationsFullIndexPolicy(trackplus, trackminus))) {
       histos.fill(HIST("hPhiCount"), 0.5);
@@ -981,8 +982,9 @@ struct ResonancesGfwFlow {
     return;
   }
 
-  template <typename TTrack, char... chars, typename TCollision>
-  void likeSignPhi(const TTrack& track, const TCollision& collision, double plusmass, const ConstStr<chars...>& hist)
+  template <typename TTrack, typename TName, typename TCollision>
+    requires is_const_str<TName>::value
+  void likeSignPhi(const TTrack& track, const TCollision& collision, double plusmass, const TName& hist)
   {
     ROOT::Math::PxPyPzMVector daug1, daug2, mom;
     for (auto const& [part1, part2] : o2::soa::combinations(o2::soa::CombinationsFullIndexPolicy(track, track))) {
diff --git a/PWGCF/TwoParticleCorrelations/Tasks/longRangeDihadronCor.cxx b/PWGCF/TwoParticleCorrelations/Tasks/longRangeDihadronCor.cxx
index 8f66d3bfb27..69b1691a7b9 100644
--- a/PWGCF/TwoParticleCorrelations/Tasks/longRangeDihadronCor.cxx
+++ b/PWGCF/TwoParticleCorrelations/Tasks/longRangeDihadronCor.cxx
@@ -835,8 +835,9 @@ struct LongRangeDihadronCor {
     return true;
   }
 
-  template <char... chars>
-  void fillProfile(const GFW::CorrConfig& corrconf, const ConstStr<chars...>& tarName, const double& cent)
+  template <typename TName>
+    requires is_const_str<TName>::value
+  void fillProfile(const GFW::CorrConfig& corrconf, const TName& tarName, const double& cent)
   {
     double dnx, val;
     dnx = cfgCumulantConfig.fGFW->Calculate(corrconf, 0, kTRUE).real();
diff --git a/PWGDQ/Tasks/dqCorrelation.cxx b/PWGDQ/Tasks/dqCorrelation.cxx
index 30c0bc1a38b..47971fdcdb5 100644
--- a/PWGDQ/Tasks/dqCorrelation.cxx
+++ b/PWGDQ/Tasks/dqCorrelation.cxx
@@ -255,8 +255,9 @@ struct DqCumulantFlow {
     fGFW->CreateRegions();
   }
 
-  template <char... chars>
-  void FillProfile(const GFW::CorrConfig& corrconf, const ConstStr<chars...>& tarName, const double& axis)
+  template <typename TName>
+    requires is_const_str<TName>::value
+  void FillProfile(const GFW::CorrConfig& corrconf, const TName& tarName, const double& axis)
   {
     double dnx, val;
     dnx = fGFW->Calculate(corrconf, 0, kTRUE).real();
diff --git a/Tutorials/PWGCF/FlowGenericFramework/src/flowGFWTutorial.cxx b/Tutorials/PWGCF/FlowGenericFramework/src/flowGFWTutorial.cxx
index 49dfc3e4a81..349c0e3005b 100644
--- a/Tutorials/PWGCF/FlowGenericFramework/src/flowGFWTutorial.cxx
+++ b/Tutorials/PWGCF/FlowGenericFramework/src/flowGFWTutorial.cxx
@@ -100,8 +100,9 @@ struct GfwTutorial {
     fGFW->CreateRegions();
   }
 
-  template <char... chars>
-  void FillProfile(const GFW::CorrConfig& corrconf, const ConstStr<chars...>& tarName, const double& cent)
+  template <typename TName>
+    requires is_const_str<TName>::value
+  void FillProfile(const GFW::CorrConfig& corrconf, const TName& tarName, const double& cent)
   {
     double dnx, val;
     dnx = fGFW->Calculate(corrconf, 0, kTRUE).real();