diff --git a/Sofa/Component/Constraint/Lagrangian/Model/src/sofa/component/constraint/lagrangian/model/FixedLagrangianConstraint.inl b/Sofa/Component/Constraint/Lagrangian/Model/src/sofa/component/constraint/lagrangian/model/FixedLagrangianConstraint.inl
index 2e7bf6bfd514..cb6bbd9694e8 100644
--- a/Sofa/Component/Constraint/Lagrangian/Model/src/sofa/component/constraint/lagrangian/model/FixedLagrangianConstraint.inl
+++ b/Sofa/Component/Constraint/Lagrangian/Model/src/sofa/component/constraint/lagrangian/model/FixedLagrangianConstraint.inl
@@ -39,18 +39,7 @@ FixedLagrangianConstraint<DataTypes>::FixedLagrangianConstraint(MechanicalState*
 template<class DataTypes>
 void FixedLagrangianConstraint<DataTypes>::init()
 {
-
     Inherit1::init();
-
-    if(this->mstate.get())
-    {
-        this->d_componentState.setValue(sofa::core::objectmodel::ComponentState::Valid);
-    }
-    else
-    {
-        msg_error(this)<<"Data \'mstate\' not specified, unable to find a compatible mechanical state in the current context";
-        this->d_componentState.setValue(sofa::core::objectmodel::ComponentState::Invalid);
-    }
 }
 
 
diff --git a/Sofa/framework/Core/src/sofa/core/behavior/Constraint.h b/Sofa/framework/Core/src/sofa/core/behavior/Constraint.h
index 3de988e60fd4..dd3dbb446093 100644
--- a/Sofa/framework/Core/src/sofa/core/behavior/Constraint.h
+++ b/Sofa/framework/Core/src/sofa/core/behavior/Constraint.h
@@ -59,6 +59,8 @@ class Constraint : public BaseConstraint, public SingleStateAccessor<DataTypes>
     Constraint(MechanicalState<DataTypes> *mm = nullptr);
 
     ~Constraint() override;
+
+    virtual void init() override;
 public:
     Data<Real> endTime;  ///< Time when the constraint becomes inactive (-1 for infinitely active)
     virtual bool isActive() const; ///< if false, the constraint does nothing
diff --git a/Sofa/framework/Core/src/sofa/core/behavior/Constraint.inl b/Sofa/framework/Core/src/sofa/core/behavior/Constraint.inl
index c6b0402ec95e..e80274dd83a2 100644
--- a/Sofa/framework/Core/src/sofa/core/behavior/Constraint.inl
+++ b/Sofa/framework/Core/src/sofa/core/behavior/Constraint.inl
@@ -47,6 +47,13 @@ bool Constraint<DataTypes>::isActive() const
     return endTime.getValue()>getContext()->getTime();
 }
 
+template <class DataTypes>
+void Constraint<DataTypes>::init()
+{
+    Inherit1::init();
+    Inherit2::init();
+}
+
 template<class DataTypes>
 void Constraint<DataTypes>::getConstraintViolation(const ConstraintParams* cParams, linearalgebra::BaseVector *v)
 {
diff --git a/Sofa/framework/Core/src/sofa/core/behavior/SingleStateAccessor.h b/Sofa/framework/Core/src/sofa/core/behavior/SingleStateAccessor.h
index dc748d9897af..e64052c82b7f 100644
--- a/Sofa/framework/Core/src/sofa/core/behavior/SingleStateAccessor.h
+++ b/Sofa/framework/Core/src/sofa/core/behavior/SingleStateAccessor.h
@@ -41,6 +41,8 @@ class SingleStateAccessor : public virtual StateAccessor
     {
         Inherit1::init();
 
+        d_componentState.setValue(sofa::core::objectmodel::ComponentState::Valid);
+
         if (!mstate.get())
         {
             mstate.set(dynamic_cast< MechanicalState<DataTypes>* >(getContext()->getMechanicalState()));
@@ -48,6 +50,7 @@ class SingleStateAccessor : public virtual StateAccessor
             msg_error_when(!mstate) << "No compatible MechanicalState found in the current context. "
                 "This may be because there is no MechanicalState in the local context, "
                 "or because the type is not compatible.";
+            d_componentState.setValue(sofa::core::objectmodel::ComponentState::Invalid);
         }
 
         l_mechanicalStates.clear();