Start by deleting the view on the database

What causes this issue?

When attempting to delete a transparent matchcode ID (update type = 'I')
from the ABAP/4 Dictionary, the view created on the
database for this matchcode ID was found to still exist. Before the
matchcode ID definition can be removed from the ABAP/4 Dictionary,
however, the view created for this
matchcode ID must be deleted from the database.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

The system does not allow deletion of the matchcode ID definition from
the ABAP/4 Dictionary. Nothing is changed.

How to fix this error?

Delete the view created for the matchcode ID
from the database. You can use the corresponding functions in the
"Utilities" menu.

Error message extract from SAP system. Copyright SAP SE.