Hello MAHARANI INTAN P,

You can remove attachment from any record by clicking the button show in the image.

https://drive.google.com/file/d/1RNY2YjKCL0jd31W_QqoPMg58SMM2_UQ4/view?usp=sharing

I hope it will help you.

Thanks & Regards,
Email: odoo@aktivsoftware.com
Skype: kalpeshmaheshwari

Hi,

If it's attached in a record, then you can delete it by clicking the bin icon that you see when you hover on the attachment. To delete it from ir.attachment model got to model, open the record and under action button click on delete option.

Regards