When I'm running sudo apt update on my orangepi5 device, I got these errors:

Hit:1 https://download.docker.com/linux/ubuntu jammy InRelease
Hit:2 https://repo.ivpn.net/stable/ubuntu ./generic InRelease                                                                                        
Hit:3 https://pkg.cloudflare.com/cloudflared jammy InRelease                                                                                         
Ign:4 https://repo.mongodb.org/apt/ubuntu jammy/mongodb-org/7.0 InRelease                                                                            
Hit:6 http://repo.huaweicloud.com/ubuntu-ports jammy InRelease                                                                                       
Hit:8 http://repo.huaweicloud.com/ubuntu-ports jammy-security InRelease                                                                              
Get:9 http://repo.huaweicloud.com/ubuntu-ports jammy-updates InRelease [128 kB]                                 
Hit:10 http://repo.huaweicloud.com/ubuntu-ports jammy-backports InRelease                                                  
Hit:11 https://repo.mongodb.org/apt/ubuntu jammy/mongodb-org/7.0 Release                  
Hit:12 https://ppa.launchpadcontent.net/deadsnakes/ppa/ubuntu jammy InRelease             
Hit:13 https://ppa.launchpadcontent.net/ondrej/php/ubuntu jammy InRelease
Hit:14 http://ppa.launchpad.net/rabbitmq/rabbitmq-erlang/ubuntu jammy InRelease
Hit:5 https://packagecloud.io/rabbitmq/rabbitmq-server/ubuntu jammy InRelease
Hit:15 https://ppa.launchpadcontent.net/redislabs/redis/ubuntu jammy InRelease
Ign:16 http://repo.huaweicloud.com/ubuntu-ports jammy-updates/main armhf Packages
Get:17 http://repo.huaweicloud.com/ubuntu-ports jammy-updates/main arm64 Packages [1,737 kB]
Get:18 http://repo.huaweicloud.com/ubuntu-ports jammy-updates/universe armhf Packages [845 kB]
Ign:18 http://repo.huaweicloud.com/ubuntu-ports jammy-updates/universe armhf Packages
Get:16 http://repo.huaweicloud.com/ubuntu-ports jammy-updates/main armhf Packages [945 kB]
Err:16 http://repo.huaweicloud.com/ubuntu-ports jammy-updates/main armhf Packages
  File has unexpected size (944824 != 944876). Mirror sync in progress? [IP: 103.172.25.237 80]
  Hashes of expected file:
   - Filesize:944876 [weak]
   - SHA256:05dbf070158dd9953ee5c260a2e2f9950e420eb6fd4eefe30723e1a248a799cd
   - SHA1:d2716f274b0fa5766f88a42f8dede17b08eb8d54 [weak]
   - MD5Sum:6f5bae8e83a1007cc2bd91620c9f4dca [weak]
  Release file created at: Mon, 26 Aug 2024 00:14:45 +0000
Hit:7 https://packagecloud.io/varnishcache/varnish60lts/ubuntu jammy InRelease
Get:18 http://repo.huaweicloud.com/ubuntu-ports jammy-updates/universe armhf Packages [845 kB]
Err:18 http://repo.huaweicloud.com/ubuntu-ports jammy-updates/universe armhf Packages

Reading package lists... Done 
E: Failed to fetch http://repo.huaweicloud.com/ubuntu-ports/dists/jammy-updates/main/binary-armhf/Packages.xz  File has unexpected size (944824 != 944876). Mirror sync in progress? [IP: 103.172.25.237 80]
   Hashes of expected file:
    - Filesize:944876 [weak]
    - SHA256:05dbf070158dd9953ee5c260a2e2f9950e420eb6fd4eefe30723e1a248a799cd
    - SHA1:d2716f274b0fa5766f88a42f8dede17b08eb8d54 [weak]
    - MD5Sum:6f5bae8e83a1007cc2bd91620c9f4dca [weak]
   Release file created at: Mon, 26 Aug 2024 00:14:45 +0000
E: Failed to fetch http://repo.huaweicloud.com/ubuntu-ports/dists/jammy-updates/universe/binary-armhf/Packages.xz  
E: Some index files failed to download. They have been ignored, or old ones used instead.

Then how I tackle it? simply I need to run:

sudo apt-get clean

Once executed, it's like nothing happened, yet go run sudo apt update again, and it's working and that error message is gone as well.

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References:

• https://askubuntu.com/questions/1147254/apt-update-fails-at-chrome-stable-main-file-has-unexpected-size-1103-1104