Apparently I messed up and forgot to change the events and shops including the ship tickets and teleport stones after changing their item ID numbers. You can download a fix for those events here: https://my.hidrive.com/lnk/fQKotY1y
Should you have missed one of the teleport stones due to the bug, you can get all stones at the book next to your bed in the sleeping chambers.
I'll update the "update files only".zips with the fix as well. Since it takes very long to upload all full versions again, I'll take a few days to add some new content before re-uploading those once more.
Sorry for the trouble and thanks for your understanding.