Hi,

In person account type,i need to change the field access levels to 'edit' using apex trigger,but for person account record type the contact sharing setting will be controlled by parent, when i tried to write trigger code on account, to chane the contact field access levels,i am getting error like below 

Error: Compile Error: Field is not writeable: ContactShare.ContactAccessLevel at line 91 column 18  


the code is 

ContactShare cs = new ContactShare();

 cs.ContactAccessLevel = 'Edit'; 

 cs.ContactId = contact.Id;   

 Database.SaveResult accountInsertResults = Database.insert(cs, false);

Please help me