Hi @TopDeepaW 

could you check the tab General if the person is protected?

Hi

Person record is not protected.

Can not delete using PL/SQL developer as well.

Hi @TopDeepaW , Kindly check the database Sessions window and see whether you can find any record related to the Person comm.method and also with ACTIVE/INACTIVE status.

Then you can RMB on the specific line and select Kill session.

Please make sure that you have chosen the correct record.

once the session is killed, you should be able to remove this line successfully.

Hi @MitDenukN 

Thank you for your support. Now I can delete records successfully.

Hi @TopDeepaW, Happy to hear that it has worked.

Cheers!