Did I receive the wrong vacuum cleaner bag or why does this bag not fit in my Siemens vacuum cleaner?

We often receive customer inquiries because the bags they ordered and sent to them do not fit their Siemens vacuum cleaner.
If we ask what exactly is not fitting and the customer says that the bag cannot be hung up, the matter is clear.
The
bag holder for Siemens is missing. This was probably accidentally thrown away when the bag was last changed.
This angled holder fixes and positions the bag. Among other things, it ensures that the position of the opening of the dust bag and that of the suction nozzle match and that the vacuumed material gets into the bag.
Without this holder, it is not possible to install the dust bag.