SAP Message QI123 - Valuation &1 of characteristic for confirmation no. &2 not allowed

Diagnosis
You are confirming a valuation &V1& for the inspection characteristicwith the confirmation number &V2&. This valuation is not allowed.

Procedure
Only the values 'A' (accepted) and 'R' (rejected) can be used asvaluations. Correct the confirmation record accordingly.