Message type: E = Error
Message class:  EA - IDoc Basis Messages 
Message number: 486
Message text: View & exists already
View &v1& cannot be created because the view exists already.
The operation was canceled.
You can modify view &v1&.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message EA486 ("View & exists already") typically occurs when you attempt to create a database view that already exists in the system. This can happen in various scenarios, such as when you are trying to create a new view with the same name as an existing one or when there is a conflict in the naming conventions.
Cause:
Duplicate View Name: You are trying to create a view with a name that is already in use.
Transport Issues: If you are transporting objects between systems, a view may already exist in the target system.
Development Environment: In a development environment, multiple developers might inadvertently try to create the same view.
Solution:
Check Existing Views: Before creating a new view, check if a view with the same name already exists. You can do this by using transaction SE11 (Data Dictionary) and searching for the view name.
Rename the View: If you need to create a
Get instant SAP help. Sign up for our Free Essentials Plan. 
EA485 Extension & has been generated and cannot be deleted
What causes this issue?  Extension &v1& was generated via a program.System Response  The extension cannot be deleted via the definition tools....
EA484 Basic type & has been generated and cannot be deleted
What causes this issue?  Basic type &v1& was generated by a program.System Response  The basic type cannot be deleted via the definition tools...
EA487 View & could not be created
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
EA488 View & does not exist
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.