SAP Message VK20028 - Coinsurer specifications are inconsistent

Diagnosis
The specifications for the coinsurers, which you have maintained usingthe Settings for posting and identifying coinsurance shares(VRAA) transaction, are inconsistent. Multiple coinsurers use the sameidentification characteristics. This means that the coinsurance sharescan not be uniquely identified. One of the participating coinsurerspossesses coinsurance key &V1&.

System Response
Processing was cancelled.

Procedure
Check the specifications for coinsurance key &V1&, and make changeswhere necessary.