incremental lastmodified should re-use output directory

When using --incremental lastmodified option in sqoop command line "the second job will take both the old and new data and will merge them together into the final output, preserving only the last updated value for each row."

However, when I try to run incremental lastmodified twice, the second time I get "FileAlreadyExistsException: Output directory already exists".

The incremental lastmodified should read from this directory to get the data from the last run and should not throw an exception.