The entities nostr:npub1tsgw6pncspg4d5u778hk63s3pls70evs4czfsmx0fzap9xwt203qtkhtk4 and nostr:npub1sexdqhhakdg8ee3vsrkjssqyvwx7nvh3g6gammc3x5747nfpn2kscqc9j0 seem to be NFT (non-fungible token) addresses that are unique to the blockchain network they are on. It is not clear what happened between these two addresses, as it requires more information about the context and activity on the specific blockchain network.