diff --git a/src/Model/HydraulicStructures/Basic/HydraulicStructures.py b/src/Model/HydraulicStructures/Basic/HydraulicStructures.py
index bbb10c2c..35ef0370 100644
--- a/src/Model/HydraulicStructures/Basic/HydraulicStructures.py
+++ b/src/Model/HydraulicStructures/Basic/HydraulicStructures.py
@@ -52,7 +52,7 @@ class BasicHS(SQLSubModel):
         self._enabled = True
         self._data = []
 
-        BasicHS._id_cnt = max(BasicHS._id_cnt + 1, self.id)
+        BasicHS._id_cnt = max(BasicHS._id_cnt + 1, self.id + 1)
 
     @classmethod
     def _db_create(cls, execute):
diff --git a/src/Model/HydraulicStructures/HydraulicStructures.py b/src/Model/HydraulicStructures/HydraulicStructures.py
index 04845d48..86e42e2c 100644
--- a/src/Model/HydraulicStructures/HydraulicStructures.py
+++ b/src/Model/HydraulicStructures/HydraulicStructures.py
@@ -59,7 +59,7 @@ class HydraulicStructure(SQLSubModel):
 
         HydraulicStructure._id_cnt = max(
             HydraulicStructure._id_cnt + 1,
-            self.id
+            self.id + 1
         )
 
     @classmethod