SAP Message 62440 - Condition types for tenancy law "&" blocked by "&"

Diagnosis You want to maintain the condition types of the service chargesettlement for tenancy law "&V1&". However user "&V2&" has alreadyaccessed this data. System Response You can only access this data when user "&V2&" has terminated hisdialog. Procedure Wait until the data has been released by user "&V2&".