When the genome was submitted, NCBI reported a problem:
We ran your sequences through our Contamination Screen. The screen found contigs that need to be trimmed and/or excluded. Please adjust the sequences appropriately and then resubmit your sequences. After you remove the contamination, trim any Ns at the ends of the sequence and remove any sequences that are shorter than 200 nt and not part of a multi-component scaffold. Note that hits in eukaryotic genomes to mitochondrial sequences can be ignored when specific criteria are met. Those criteria are explained below. Note that mismatches between the name of the adaptor/primer identified in the screen and the sequencing technology used to generate the sequencing data should not be used to discount the validity of the screen results as the adaptors/primers of many different sequencing platforms share sequence similarity.
How do I correct these sequences?
The note above tells you what you need to do.