Backup: Fix backup.

src/Model/Study.py

@@ -112,6 +112,9 @@ class Study(SQLModel):
             self._old_save_id += 1
             is_new = True
 
+        if ".backup" in self.filename:
+            is_new = True
+
         self._init_db_file(self.filename, is_new=is_new)
         self.commit()