On an "apt-get update" I get the following errors:

Err:10 http://pkgmaster.devuan.org/merged beowulf/main armhf Contents 
(deb)
   Hash Sum mismatch
   Hashes of expected file:
    - Filesize:31681725 [weak]
    - 
SHA256:04dda4a3166f89d6cd274bd662e29997a9c59c0015e3a29537c5918ff35edd01
   Hashes of received file:
    - 
SHA256:1a6257d5b3f955d4e5bb7b6c2d760734d5f3526a8469e55dbb0967f3235e3be3
    - Filesize:31681725 [weak]
   Last modification reported: Sat, 13 Jun 2020 23:25:25 +0000
   Release file created at: Sun, 14 Jun 2020 06:28:02 +0000

Err:26 http://pkgmaster.devuan.org/merged beowulf-updates/main armhf 
Contents (deb)
   Hash Sum mismatch
   Hashes of expected file:
    - Filesize:39165 [weak]
    - 
SHA256:7145f997c5a76b48594627eef3d031103b1dc64ac207f8d32f366de0d8507be1
   Hashes of received file:
    - 
SHA256:3dc42338c18b4a11cdaddb372147406907590635b921ac291e3dff3f02a52caa
    - Filesize:39165 [weak]
   Last modification reported: Sat, 13 Jun 2020 23:27:19 +0000
   Release file created at: Sun, 14 Jun 2020 08:32:01 +0000

Err:32 http://pkgmaster.devuan.org/merged beowulf-security/main arm64 
Contents (deb)
   Hash Sum mismatch
   Hashes of expected file:
    - Filesize:36 [weak]
    - 
SHA256:11ddecec635785e907e11a662850add534e38646eafa507b674f885ce1ce63eb
   Hashes of received file:
    - 
SHA256:5a4f741de9c8e09be68cecd014d109d97e6d0ba35395bb673770c7b5e388e302
    - Filesize:36 [weak]
   Last modification reported: Sat, 13 Jun 2020 23:21:42 +0000
   Release file created at: Sun, 14 Jun 2020 06:28:01 +0000

E: Failed to fetch 
http://pkgmaster.devuan.org/merged/dists/beowulf/main/Contents-armhf.gz  
Hash Sum mismatch
    Hashes of expected file:
     - Filesize:31681725 [weak]
     - 
SHA256:04dda4a3166f89d6cd274bd662e29997a9c59c0015e3a29537c5918ff35edd01
    Hashes of received file:
     - 
SHA256:1a6257d5b3f955d4e5bb7b6c2d760734d5f3526a8469e55dbb0967f3235e3be3
     - Filesize:31681725 [weak]
    Last modification reported: Sat, 13 Jun 2020 23:25:25 +0000
    Release file created at: Sun, 14 Jun 2020 06:28:02 +0000
E: Failed to fetch 
http://pkgmaster.devuan.org/merged/dists/beowulf/main/Contents-arm64.gz
E: Failed to fetch 
http://pkgmaster.devuan.org/merged/dists/beowulf/contrib/Contents-armhf.gz
E: Failed to fetch 
http://pkgmaster.devuan.org/merged/dists/beowulf/contrib/Contents-arm64.gz
E: Failed to fetch 
http://pkgmaster.devuan.org/merged/dists/beowulf/non-free/Contents-arm64.gz
E: Failed to fetch 
http://pkgmaster.devuan.org/merged/dists/beowulf/non-free/Contents-armhf.gz
E: Failed to fetch 
http://pkgmaster.devuan.org/merged/dists/beowulf-updates/main/Contents-armhf.gz 
  Hash Sum mismatch
    Hashes of expected file:
     - Filesize:39165 [weak]
     - 
SHA256:7145f997c5a76b48594627eef3d031103b1dc64ac207f8d32f366de0d8507be1
    Hashes of received file:
     - 
SHA256:3dc42338c18b4a11cdaddb372147406907590635b921ac291e3dff3f02a52caa
     - Filesize:39165 [weak]
    Last modification reported: Sat, 13 Jun 2020 23:27:19 +0000
    Release file created at: Sun, 14 Jun 2020 08:32:01 +0000
E: Failed to fetch 
http://pkgmaster.devuan.org/merged/dists/beowulf-updates/main/Contents-arm64.gz
E: Failed to fetch 
http://pkgmaster.devuan.org/merged/dists/beowulf-updates/contrib/Contents-armhf.gz
E: Failed to fetch 
http://pkgmaster.devuan.org/merged/dists/beowulf-updates/contrib/Contents-arm64.gz
E: Failed to fetch 
http://pkgmaster.devuan.org/merged/dists/beowulf-updates/non-free/Contents-armhf.gz
E: Failed to fetch 
http://pkgmaster.devuan.org/merged/dists/beowulf-updates/non-free/Contents-arm64.gz
E: Failed to fetch 
http://pkgmaster.devuan.org/merged/dists/beowulf-security/main/Contents-arm64.gz 
  Hash Sum mismatch
    Hashes of expected file:
     - Filesize:36 [weak]
     - 
SHA256:11ddecec635785e907e11a662850add534e38646eafa507b674f885ce1ce63eb
    Hashes of received file:
     - 
SHA256:5a4f741de9c8e09be68cecd014d109d97e6d0ba35395bb673770c7b5e388e302
     - Filesize:36 [weak]
    Last modification reported: Sat, 13 Jun 2020 23:21:42 +0000
    Release file created at: Sun, 14 Jun 2020 06:28:01 +0000
E: Failed to fetch 
http://pkgmaster.devuan.org/merged/dists/beowulf-security/main/Contents-armhf.gz
E: Failed to fetch 
http://pkgmaster.devuan.org/merged/dists/beowulf-security/contrib/Contents-arm64.gz
E: Failed to fetch 
http://pkgmaster.devuan.org/merged/dists/beowulf-security/contrib/Contents-armhf.gz
E: Failed to fetch 
http://pkgmaster.devuan.org/merged/dists/beowulf-security/non-free/Contents-armhf.gz
E: Failed to fetch 
http://pkgmaster.devuan.org/merged/dists/beowulf-security/non-free/Contents-arm64.gz
E: Some index files failed to download. They have been ignored, or old 
ones used instead.