I made a mistake in the numbering of SeaLion. If you installed SeaLion before it is version SeaLion 32.4.0 although I called it 32.4.1. I now added the actual 32.4.1 version to the repository but apt will not recognise an update. To install the latest version of SeaLion do the following:
sudo apt remove sealion
sudo apt update
sudo apt install sealion