authorzation failed while the file is being uploaded with the argument --incremental-mode

[stupidloud]

ERROR: unauthorized for application key with capabilities 'writeBucketEncryption,readBucketReplications,listAllBucketNames,writeFiles,readBucketEncryption,writeBucketReplications,readFiles,listFiles,listBuckets,readBuckets,deleteFiles,shareFiles', restricted to bucket 'bucketname1' (None)

sometimes my bucket has unfinished uploading large files, I always manually deleted them.
I assume --incremental-mode has a capability to append data to the these files, instead of adding another version.
but the uploading is failed with the message on the first line.