abandontransaction "txid"

The abandontransaction RPC marks an in-wallet transaction and all its in-wallet descendants as abandoned. This allows their inputs to be respent.

*bitcoin-cli help abandontransaction

abandontransaction "txid"

Mark in-wallet transaction  as abandoned
This will mark this transaction and all its in-wallet descendants as abandoned which will allow
for their inputs to be respent.  It can be used to replace "stuck" or evicted transactions.
It only works on transactions which are not included in a block and are not currently in the mempool.
It has no effect on transactions which are already abandoned.

Arguments:
1. "txid"    (string, required) The transaction id

Result:

Examples:
> bitcoin-cli abandontransaction "1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d"
> curl --user myusername --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "abandontransaction", "params": ["1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d"] }' -H 'content-type: text/plain;' http://127.0.0.1:8332/