If you want, you can add the next one after the last gets added to their block; otherwise, wait for the average tx fee to lower to sub 30sat/vB.
The newer transactions are doing CPFP for the older transactions and according to
mempool.space, the combined fee rate for the transaction in question is 44.1 sat/vbyte.
Edit:
Hi, how could I avoid my txn being mixed with parent txn with low fees? Is there a way to do it?
You shouldn't spend the fund that comes from an unconfirmed transaction.
You should use a wallet which supports coin control, so that you can choose which coin you want to be used for your transaction.
If you don't have any other fund in your wallet and you want to make a transaction which is confirmed fast, you have to pay higher fees, so that miners include both transactions (the parent and the child) in the same block.
I'm trying to add the second txn you sent to viabtc but it's not working. So that means I have to wait for the first parent txn to be confirmed first?
Yes.