Mmhh, looking at your fstab entry (thanks for pointing to it) this doesn’t seem to be unique: You’re using the UUID of the whole disk but it contains more than 1 partition.
Example using ssh
$ blkid
...
/dev/sda1: BLOCK_SIZE="512" UUID="FC887EEE887EA734" TYPE="ntfs" PARTUUID="45b4b642-01"
...
In the fstab file, you should use the key PARTUUID instead of UUID key to uniquely identify the correct partition. I also wouldn’t recommend using the /media folder for custom mounts instead of /mnt, as this interferes with the udisks-glue process, which automatically mounts mass storage devices under /media. However, changing the directory name in fstab would automatically cause all paths in the media database to point to the void unless path substitution is used (thx @darwindesign for this nice article).
The cleanest method, however, would be to completely rebuild the media database with the new source (/mnt mount point).