Let's say I send from wallet 1 a bitcoin tx to address blalba. The fee used was too low so the tx is stuck in the mempool for some time. Can I use a separate Bitcoin wallet to bump up the fee? For example, by sending a small amount with a higher fee, to the same address (blabla). Will it bump up the fee of the first tx, or does it create a separate tx ID? How would an increase of tx fee from a different wallet be possible, if at all, otherwise?