Removing AD/LDAP group that was assigned to a business role lead to send email for the role Owner

Hello ,
I am using One Identity v8.1
I am facing an issue whenever I assign AD /LDAP group to a business role later i request to remove that group the role owner recieves and email with a request and email saying New unsubscribing approval requests for group! however the request disappear after 4/5 minutes but the email will be sent! 

how can I change that and prevent sending this request/email to the role owner when i delete AD/LDAP group!

Thanks