some error when builder request builder-relay-goerli.flashbots.net

[ocoderr]

I run a builder and prysm on goerli .
builder version: branch: capella-1.11.4
prysm version: flashbots/prysm branch:develop-boost commit 31558723

builder run cmd:
./geth --goerli --builder --verbosity 3 --nat extip:xxx.xxx.xxx.xxx --port 32305 --discovery.port 32305 --datadir /MS-4Tx2-ZFS-RAID0/flashbots-goerli/execution/geth --authrpc.jwtsecret /MS-4Tx2-ZFS-RAID0/flashbots-goerli/jwt.hex --authrpc.port=18551 --cache 2048 --maxpeers 250 --builder.beacon_endpoint=http://127.0.0.1:13500 --builder.listen_addr 0.0.0.0:28545 --miner.extradata xxxxx --builder.remote_relay_endpoint=https://0xafa4c6985aa049fb79dd37010438cfebeb0f2bd42b115b89dd678dab0670c1de38da0c4e9138c9290a398ecd9a0b3110@builder-relay-goerli.flashbots.net

flashbots/prysm run cmd:
bazel run //cmd/beacon-chain:beacon-chain --config=release -- --datadir=/MS-4Tx2-ZFS-RAID0/flashbots-goerli/consensus/prysm-from-checkpoint --execution-endpoint=http://127.0.0.1:18551 --prater --jwt-secret=/MS-4Tx2-ZFS-RAID0/flashbots-goerli/jwt.hex --suggested-fee-recipient=0xbc4c946b8dcF1Cb2a6D7d7a91B69835321EDc085 --rpc-port 14000 --grpc-gateway-port 13500 --p2p-tcp-port 13001 --p2p-udp-port 12001 --min-sync-peers 7 --http-mev-relay=https://0xafa4c6985aa049fb79dd37010438cfebeb0f2bd42b115b89dd678dab0670c1de38da0c4e9138c9290a398ecd9a0b3110@builder-relay-goerli.flashbots.net

get some error on prysm log

builder log:

what is meaning about:
ERROR[03-20|01:49:12.190] could not submit capella block err="error sending http request to relay https://0xafa4c6985aa049fb79dd37010438cfebeb0f2bd42b115b89dd678dab0670c1de38da0c4e9138c9290a398ecd9a0b3110@builder-relay-goerli.flashbots.net. err: HTTP error response: 400 / {"code":400,"message":"submission for past slot"}\n"

ERROR[03-20|01:49:58.955] could not submit capella block err="error sending http request to relay https://0xafa4c6985aa049fb79dd37010438cfebeb0f2bd42b115b89dd678dab0670c1de38da0c4e9138c9290a398ecd9a0b3110@builder-relay-goerli.flashbots.net. err: HTTP error response: 400 / {"code":400,"message":"invalid signature"}\n" #commitedBundles=0

WARN [03-20|01:50:12.938] Served builder_payloadAttributes conn=127.0.0.1:54218 reqid=563 duration="151.915µs" err="validator not found"