HS: Fix basic HS previous data delete at save.

src/Model/HydraulicStructures/Basic/HydraulicStructures.py

@@ -127,10 +127,6 @@ class BasicHS(SQLSubModel):
         return new
 
     def _db_save(self, execute, data=None):
-        execute(
-            "DELETE FROM hydraulic_structures_basic " +
-            f"WHERE id = {self.id}"
-        )
         hs_id = data['hs_id']
 
         sql = (

src/Model/HydraulicStructures/HydraulicStructures.py

@@ -172,6 +172,11 @@ class HydraulicStructure(SQLSubModel):
         execute(sql)
 
         data['hs_id'] = self.id
+        execute(
+            "DELETE FROM hydraulic_structures_basic " +
+            f"WHERE hs = {self.id}"
+        )
+
         for basic in self._data:
             basic._db_save(execute, data)