I don’t understand what “lifetime” means. What if multiple people publish it? How does this affect open source software? A lot of software uses restrictive lic

I don’t understand what “lifetime” means. What if multiple people publish it? How does this affect open source software? A lot of software uses restrictive licenses such as AGPL. There could be many people that own the copyright or an organization. The intent of AGPL software is that it isn’t used without giving back to the community.