Admin can't add data for other users

I have user table with Customer_ID as Owner ID

and I have message table Where Customer_ID is as Owner ID
I have admin user and customer
on message table i have given permission to customer is only view and to admin group it is that admin group can see and edit other users date
on advance i have selected "user can see and edit their own data"
Now when i try to add some data through admin for other users by entering their Customer_ID it automatically change Customer_ID to admin ID number
Is there any solution to this without creating separate view for Admin and Client.