The NFT platform Metaplex on Solana announced that starting next Friday (January 6), creators will be able to upgrade existing NFT series to start enabling royalty enforcement. who) two. Once the creator initiates the on-chain upgrade process, a 14-day countdown will begin before the upgrade takes effect. Metaplex stated that existing NFT series will have 90 days to upgrade, after which it will be possible to mint programmable NFTs or regular NFTs through the use of mandatory royalties, but migration between the two will not be supported.