'Recover seed-phrase from private key

I've created an account using near-cli / near-sdk, thus got private keys in ~/.near-credentials.

In order to use the new account in wallet.near.org I need the seed-phrase. How I can "convert" a private key to a seed-phrase?

nearprotocol near

Solution 1:^[1]

This is cryptographically impossible, assuming that this works in NEAR the same as in Bitcoin etc.

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Solution	Source
Solution 1	Roman Plášil