From 2c07f3a72aa3fb81fb60a6fe078361b67d1fc42a Mon Sep 17 00:00:00 2001
From: Florian OMNES <florian.omnes@rte-france.com>
Date: Thu, 27 Jul 2023 17:56:59 +0200
Subject: [PATCH] Accept empty group / no group for binding constraints

---
 .../binding_constraint/BindingConstraintLoader.cpp  | 13 -------------
 .../binding_constraint/BindingConstraintSaver.cpp   |  2 ++
 2 files changed, 2 insertions(+), 13 deletions(-)

diff --git a/src/libs/antares/study/binding_constraint/BindingConstraintLoader.cpp b/src/libs/antares/study/binding_constraint/BindingConstraintLoader.cpp
index 657a0284f6..757e0f17a5 100644
--- a/src/libs/antares/study/binding_constraint/BindingConstraintLoader.cpp
+++ b/src/libs/antares/study/binding_constraint/BindingConstraintLoader.cpp
@@ -152,19 +152,6 @@ std::vector<std::shared_ptr<BindingConstraint>> BindingConstraintLoader::load(En
                      << "]: Invalid operator [less,greater,equal,both]";
         return {};
     }
-    if (bc->group_.empty())
-    {
-        if (env.version >= version870)
-        {
-            logs.error() << env.iniFilename << ": in [" << env.section->name
-                         << "]: Missing mandatory binding constraint group";
-            return {};
-        }
-        else
-        {
-            bc->group_ = "legacy_study_group";
-        }
-    }
 
     // The binding constraint can not be enabled if there is no weight in the table
     if (bc->pLinkWeights.empty() && bc->pClusterWeights.empty())
diff --git a/src/libs/antares/study/binding_constraint/BindingConstraintSaver.cpp b/src/libs/antares/study/binding_constraint/BindingConstraintSaver.cpp
index 28e949654d..9390c06edf 100644
--- a/src/libs/antares/study/binding_constraint/BindingConstraintSaver.cpp
+++ b/src/libs/antares/study/binding_constraint/BindingConstraintSaver.cpp
@@ -21,6 +21,8 @@ bool BindingConstraintSaver::saveToEnv(EnvForSaving& env, const BindingConstrain
     env.section->add("filter-year-by-year", datePrecisionIntoString(bindingConstraint->pFilterYearByYear));
     env.section->add("filter-synthesis", datePrecisionIntoString(bindingConstraint->pFilterSynthesis));
 
+    env.section->add("group", bindingConstraint->group());
+
     if (!bindingConstraint->pComments.empty())
         env.section->add("comments", bindingConstraint->pComments);