Update() to an MS Access database Long binary data field does not work

if I connect to a local MS Access database I cannot seem to write to a field formatted as Long binary data. The connection works fine, I can read/write this database fine when using other fields. My update() function looks like this

update (DBConnection, tableName, fieldName, {1, 2, 3, 4, 5}, 'where GUID = XYZ');

The error I get is this:

Error using database.odbc.connection/update (line 81)

Number of whereclauses must be one or match the number of data records to be updated.