SAP Message UGMD144 - Conflict in keys of field name &1; conversion failed

Diagnosis
The combined characteristics are compounded with the same key field &v1&
. The combined characteristic values, however, have different values (
V2 and v3) for thecompound characteristic.Data conversion for this combination value is not possible.
Example:
A combination characteristic comprises characteristic A andcharacteristic B. Both characteristics are compounded withcharacteristic X. A combination characteristic value consists of acombination of 10/20 (X/A) and 20/100 (X/B). The combinationcharacteristic now consists of fields X, A and B. The value for X is nolonger unique. Such combinations are not valid.

System Response
The conversion of the database entry (&v4&) is not possible.

Procedure
Check whether it is possible for you to map your application scenariowith other combinations.