Before that, you can try abandontransaction to see if it'll remove the transactions as well as the descendant transactions to see if it'll remove them and mark them as spendable.
bitcoin-cli abandontransaction de188ec7d50032773a43af8703b2f17d6bde2ae701b64934bce3e8850cd6a904
If you're running anything older than 0.21.0, can you try restarting your full node and running it with -zapwallettxes as a flag at startup?
"version": 200100,
"subversion": "/Satoshi:0.20.1/",
"protocolversion": 70015,
Why is older than 0.21.0 relevant?