ONCHAIN: 1 outputs unresolved: waiting confirmation that we spent DELAYED_OUTPUT_TO_US using OUR_DELAYED_RETURN_TO_WALLET about lightning

[pabpas]

I've been trying to broadcast the transaction by increasing my bitcoind mempool size. Now I do not get the transaction rejected because of low fee but because of locktime. At this point I don't understand, locktime was 288 which is long ago. Anything I am missing here?

This is the extract of listtrasactions of what I understand is the sweep transaction:

         "hash": "c66063f0b5efa1f96cdf576e1d7f7d2b5b074138ff8caff49671628520804f4b",
         "rawtx": "02000000000101075d56dc1c87e61ce48fbbcca38323788b28558d63ebcd122eac9951ae706dbe030000000020010000012b741c000000000016001422a13f876afdef83027bf0276cabc61c1246035f0347304402201121eeb4f3da98300c1c91e9cfb1d939792497b38173ffab26bbea6c9cccf8880220411130a7a9c9d4a50140011631ddbf8fb165d5d9243f2a15211965e098e1e09901004d632103a3a9dfd9734a737e4d237cedd115f6bf35dd579a4ccc5428e932be8b6d1353606702c00fb2752103a9fbd896d5b7bcfd46ad73f4eed1ad4119f19403c048d82883118606992bf6b668ac00000000",
         "blockheight": 0,
         "txindex": 0,
         "locktime": 0,
         "version": 2,
         "inputs": [
            {  
               "txid": "be6d70ae5199ac2e12cdeb638d55288b782383a3ccbb8fe41ce6871cdc565d07",
               "index": 3,
               "sequence": 288
            }
         ],
         "outputs": [
            {  
               "index": 0,
               "amount_msat": 1864747000,
               "scriptPubKey": "001422a13f876afdef83027bf0276cabc61c1246035f"
            }
         ]
      },


$ lightning-cli sendrawtransaction 02000000000101075d56dc1c87e61ce48fbbcca38323788b28558d63ebcd122eac9951ae706dbe030000000020010000012b741c000000000016001422a13f876afdef83027bf0276cabc61c1246035f0347304402201121eeb4f3da98300c1c91e9cfb1d939792497b38173ffab26bbea6c9cccf8880220411130a7a9c9d4a50140011631ddbf8fb165d5d9243f2a15211965e098e1e09901004d632103a3a9dfd9734a737e4d237cedd115f6bf35dd579a4ccc5428e932be8b6d1353606702c00fb2752103a9fbd896d5b7bcfd46ad73f4eed1ad4119f19403c048d82883118606992bf6b668ac00000000 true
{
   "success": false,
   "errmsg": "error code: -26\nerror message:\nmandatory-script-verify-flag-failed (Locktime requirement not satisfied)"
}