Blank Tag Entry - Cycle Count

Just a quick question - when entering a part on a blank tag, does it have to be a part that is selected as part of the cycle count? We are trying to enter a random part that is set up in the same warehouse, but we keep receiving an error that says "Part is not assigned to the count cycle for which this blank tag was created". We don't receive this error if we enter a part that is already part of the cycle count. I was under the impression that blank tags could be used for any part.....if I come across a part that the system doesn't know about for instance. Thanks in advance!