[WD22] HModify() hIgnoreDuplicates not working (no replies)

I have a Customer file with the field member #. Member # is a unique key. For a specific situation, I need to bypass the field being unique. I've used hIgnoreDuplicates sparingly in the past and it's always worked as expected. Now it's not. As soon as my HModify() runs I am presented with the 'Duplicate in the data' window. It says, "The value of <MemberNumber> must be unique in the database."

HModify(Customer, hRecNumCurrent, hIgnoreDuplicates)

Anyone else had this issue?

EDIT: The database and file in question are hfsql client/server.