Too many characteristics (&2) are assigned to dimension &1

What causes this issue?

Too many characteristics were assigned to the specified dimension.
The database table to be created for a dimension of a "normal" InfoCube
may not contain more than 249 fields. You therefore may assign a maximum
of 248 characteristics.
If, however, the property <LS>DIMID's </>was defined one-to-one for an
InfoCube, a <LS>unique index</> is created on the characteristics of the
dimension. In this case you can assign a maximum of 16 characteristics
for each dimension.

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?

Assign individual characteristics to another dimension or to a new
dimension so that the above limit is not exceeded.

Error message extract from SAP system. Copyright SAP SE.