&1 is not a BSP application. &2

What causes this issue?

&V1& are SAPUI5/Fiori artifacts and not a BSP (Business Server Pages)
application. To store data, SAPUI5 ABAP Repository uses the persistence
and transport infrastructure originally designed for Business Server
Pages.

System Response

The SE80 tool "Web Application Builder for BSP Applications" is no
suitable for editing SAPUI5/ Fiori artifacts, since it is designed
exclusively for the BSP programming model. Many of the properties and
entities defined in this tool, such as event handlers or navigation, are
not relevant in SAPUI5.
More specifically, the "Check" function in the tool checks the
consistency of &V1& with respect to the BSP programming model and
contains an ABAP syntax check for the ABAP code saved in the BSP pages.
The result of this check is ignored by SAPUI5/Fiori artifacts.
The ?Delete? function respects the following:
For a BSP application, the subobjects of the BSP application (the BSP
pages and controllers, the associated folders in the MIME repository
with all MIME objects, plus the identically named service nodes created
in HTTP service editing (transaction SICF) when a BSP application is
created).
For a BSP page or controller, only this object itself.
Any further entities created by SAP Web IDE or the SAPUI5 tools in
Eclipse are not respected by the delete function.

How to fix this error?

To edit SAPUI5 ABAP Repository objects, use SAP Web IDE or the SAPUI5
tools in Eclipse.
If you have any further questions, contact the application component
CA-UI5-ABA-SAR.

Procedure for System Administrators

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.