Property of the entity cannot be set

[1pluszone]

Please i am trying to save a new contact into CRM Dynamics 365 but i am getting this error.
I am sure the error is as a result of something that i am not doing right.

[wizardist]

Hi @1pluszone

fullname is a computed read-only field. You must change the concrete fields of the contact, i.e. firstname and lastname.

[1pluszone]

Thanks @wizardist
Is it possible for me to create my own custom fields?

[wizardist]

@1pluszone

What do you mean? Do you want to customize the entity via PHP code? Or do you want to create/retrieve/update records of entities with custom fields? The latter is available by default, and the former is possible theoretically.

[1pluszone]

My bad @wizardist
Thanks for the help.