SAP Message AO063 - Environ.inv. reason &1 was already used for distribution - please correct

Diagnosis
Environmental investment reason &V1& was already used for percentagedistribution.

System Response
You are not allowed to make another entry for environmental investmentreason &V1&.

Procedure
Check your entry.
Instead of making another entry for environmental investment reasonV1, you should change the percentage distribution of the existingentry. Check the existing percentage distribution of environmentalinvestment reason &V1&.