Multiple prompt messages occurrence after creating a record

Hi,

I have three workflows that are triggered by the creation of a certain record:
1- Triggered after creation of the record.
2- Triggered after creation of the record.
3- Triggered before creation of the record to add the order number.

The three workflows are working fine, but the message that I have entered to show after completion of the workflows is generated repeatedly as shown below.

So can anyone help please with the cause of this ?