Block not accepted
NOTICE  2023-11-11 14:26:00.1210 SideChain add_external_block: block xxxxxxxxxxxxxxxxxxxxxxxxxxxx has enough PoW for Monero height 3015630, submitting it
NOTICE  2023-11-11 14:26:00.1211 SideChain add_block: height = 6641356, id =xxxxxxxxxxxxxxxxxxxxxxxxxxxxx, mainchain height = 3015630, verified = 0
NOTICE  2023-11-11 14:26:00.1213 P2Pool submit_block: height = 3015801, external blob (1809 bytes)
WARNING 2023-11-11 14:26:00.1268 P2Pool submit_block (external blob): daemon returned error: Block not accepted

Server configuration:
4-core CPU, 8G memory, 250G ssd, p2pool and monerod running on the same server

./monerod --detach --data-dir=/data/block --zmq-pub tcp://127.0.0.1:18083 --out-peers 32 --in-peers 64 --add-priority-node=nodes.hashvault.pro:18080 --add-priority-node=p2pmd.xmrvsbeast.com:18080  --disable-dns-checkpoints --enable-dns-blocklist --rpc-bind-ip=0.0.0.0 --confirm-external-bind  --limit-rate-down=81920 

./p2pool --host 127.0.0.1 --wallet xxxxxxxxxx

Hello, there are a lot of warnings like this in my p2pool. Is this related to server performance or network quality?