Bip39 Vs Slip39. Press X to abort passphrase application and preserve editing the passphrase. Picking CANCEL immediately after an abort will end the process. BIP39 is actually a style implementation that lays out how copyright wallets develop the list of words (or "mnemonic codes") which make up a mnemonic sentence, https://scrapbookmarket.com/story19140044/bip39-mnemonic-https-linktr-ee-bip39-bip39-words-fundamentals-explained