Invalid "No metadata for concept" warnings about properties that do not have a value set

[arpost]

When doing a data load, the log contains WARNING: No metadata for concept warnings about properties without a value set, it seems because it doesn't know about the specific value of the property ahead of time. This is wrong, and those properties are loaded anyway. Here is an example:

WARNING: No metadata for concept edu.emory.cci.aiw.i2b2etl.dest.metadata.conceptid.PropDefConceptId@38a75842[propId=PatientDetails,propertyName=dateOfDeath,value=org.protempa.proposition.value.DateValue@512a5cc6[date=xxxx-xx-xx xx:xx:xx.x],conceptCode=<null>,metadata=edu.emory.cci.aiw.i2b2etl.dest.metadata.Metadata@347180d0]; this data will not be loaded