InfoProvider &1 cannot be used as the base of an aggregation level

What causes this issue?

An error occurred while creating an aggregation level based on the
InfoProvider &V1&. Not all InfoProviders are suitable for use as a basis
for aggregation levels.

System Response

The aggregation level was not created.

How to fix this error?

Choose an InfoProvider that is suitable to be the basis of the
aggregation level. The following InfoProviders are suitable:
MultiProviders that do not contain any aggregation levels.
Real-time InfoCubes
VirtualProviders with a function module that implement the write
interface.
&V1& does not fulfill any of these conditions and therefore cannot be
used.

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.