On line 249 within Rel-15 branch TS32291_Nchf_ConvergedCharging.yaml schema there is a required field 'nfConsumerIdentification'. This required field does not have a corresponding property value, after reading the open api json schema docs, found at...https://json-schema.org/draft/2020-12/json-schema-validation.html#rfc.section.6.5.3. It defines the statement below

As you can see the required field 'nfConsumerIdentification' is not present within the properties list, which is incorrect. It is also of note that within Rel-16 this value has been updated to 'invocationTimeStamp, which is valid.