Hi,
Please check your data sources which have your field(0gn_vendor).
Later you can check your data source transformations. Whether its mapped to cube info object or not.
if not mapped then that won't be loaded to cube.
if your cube holds related info object then you can do direct mapping from data source.
if there is no related info object in info cube then you need to add required info object and later you can do mapping.
After that you can load data.
To add info object you can use remodeling concept if data holds data.
if you need historic data then drop and reload data to cube is mandatory.
Thanks