How can I migrate an old ES256 key file to the database?

[l0gaw]

I have a current key stored in the file format with the old alg ES256. Now the default is RSA. I'm trying to migrate from File store to the Database using EF but I wouldn't like my users to lose their current jwt. Is there a way to migrate the old key file to the database? The new keys would be generated using the alg RSA.