What can I do to prevent duplicate records from entering the system?

[Yakup Karakaya]

Hello friends, I am using espocrm for the first time. I have a question. What can I do to prevent duplicate records from entering the system?

[serqet]

Hocam varlığı düzenle orada istediğin kısım.

[esforim]

You can also use the Before-Save or something like that formula where it will throw an Error if you try to create duplicate.