bip39 option is for seeds generated by other wallet software not electrum. it should lead to an empty wallet in your case.
According to the YouTube video I watched with the link in my above post, it said it would lead to an empty wallet and it did. But my confusion is how to move it to the new empty wallet because in that video the youtuber said it could be moved. I got confused moving it. That is why am asking again if anybody understood the video better than I do.