Hi,
I have my customers custom table created in dataverse having one of column as Phone number. When i navigate to particular customer from model-driven app, there is option to directly call next to phone number field.
I can click & directly call, and in background it actually opens a new form for phone call entity with pre-filled call from, call to fields.
However, when i try to SAVE, it's throwing below error:

I did try by adding one-to-many, many-to-one relationship between by customer entity & phonecall but it's not working. Any help/input is appreciated.
Thanks,
Kunal