Convert first

What causes this issue?

Before you work with queries, functional areas or user groups in this
query area, you must convert the objects.

System Response

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

How to fix this error?

Get your system administrator to convert the objects. The ABAP Query
Release Information for Release 4.0A describes how to convert these
objects. Also read Note 92124.

Error message extract from SAP system. Copyright SAP SE.