repo download.mono-project.com/repo/ubuntu preview-focal fail

[André Verwijs]

Error: 20 https://download.mono-project.com/repo/ubuntu preview-focal / 
main Sources
The file has an unexpected size (10405! = 10408). Is there a mirror sync 
in progress? [IP: 152.199.19.161 443]
Hashes of expected file:
- Filesize: 10408 [weak]
- SHA256: c5a76376b22f656608ac33d888b90d4b3f43c46a792f922c686b920543ef3a32
- SHA1: 5833e9ca1dac3556c52bd44ca45616bb75fb3090 [weak]
- MD5Sum: ad6c2eebe36243c933a5857f11bacba7 [weak]
Release file created at: Tue, 02 Mar 2021 3:00:09 PM +0000

Retrieve: 21 https://download.mono-project.com/repo/ubuntu preview-focal 
/ main amd64 Packages [46.8 kB]
Package lists are being read ... Done
E: Failed to retrieve 
https://download.mono-project.com/repo/ubuntu/dists/preview-focal/main/source/Sources.gz 
The file has an unexpected size (10405! = 10408). Is there a mirror sync 
in progress? [IP: 152.199.19.161 443]
Hashes of expected file:
- Filesize: 10408 [weak]
- SHA256: c5a76376b22f656608ac33d888b90d4b3f43c46a792f922c686b920543ef3a32
- SHA1: 5833e9ca1dac3556c52bd44ca45616bb75fb3090 [weak]
- MD5Sum: ad6c2eebe36243c933a5857f11bacba7 [weak]
Release file created at: Tue, 02 Mar 2021 15:00:09 +0000
E: Failed to get some index files. These have either been ignored or 
older versions have been used.


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