Diagnosis
You have attempted to include the field &v1& in the condition table.This field has the ABAP type &v2& and is therefore not character type.
Key fields must be character typed (ABAP Data Types C,N, D, and T). However, it is possible to use non-character-typed fieldsfor table fields that are not in the key in particular circumstances.

Procedure
Check whether the data type for field &v1& can be changed. If this isnot possible, use another field.