pamhyr: Fix save after backup and minor change.

src/Model/Study.py

@@ -103,15 +103,16 @@ class Study(SQLModel):
             except Exception as e:
                 logger.error(e)
 
+        is_new = False
         fname = fname + "." + str(self._old_save_id)
         if os.path.exists(self.filename) and ".backup" not in self.filename:
             filename = os.path.join(fdir, "_PAMHYR_", "__old__", fname)
             logger.debug(f"Backup previous version copy: {filename}")
             shutil.copy(self.filename, filename)
             self._old_save_id += 1
-        else:
-            self._init_db_file(self.filename, is_new=True)
+            is_new = True
 
+        self._init_db_file(self.filename, is_new=is_new)
         self.commit()
 
         # Save