WAA02 error - No phrases assigned to phrase set

When I try to use WAA02 transaction to edit waste generato getting below error message. Can you please help to resolve?

What am I missing?

No phrases assigned to phrase set

Message no. C$374

Diagnosis

The characteristic is assigned to a phrase set that contains no phrases.

System Response

You cannot assign a value to the characteristic.

Procedure

Notify your system administrator.