This is a local thing, your own node is rejecting the tx. Fee logic is quite complicated actually, the age the utxo and the spent value in relation to the tx size as well as a min flat fee per tx all come into play. Lowering the minimum broadcast requirements below default for your node will allow you to push that tx to your node's mempool, but chances are it won't broadcast at all to the network.

These are the 2 settings you can mess with for Core: