for instance Anna Salome Schaezel #K8DT-484, Germany Births and Baptisms 1558 - 1898, unfinished attachments 3 Sep 2018 same url as source attached 11 Jul 2021
As you say it appears the source has not been attached to each of the individuals on the Baptism Record to completion. It is possible to resolve this simply. You will need to check the record to ensure that it relates to each of the individuals and if it does and the information matches then it can be attached.
Here is a link to an article with some information that will guide you with this:
How do I handle unfinished attachments in Family Tree?
Hope it goes well for you. 🙂