The upload of insecure snapshots has been disabled per default, because those
snapshots represent a security risk if their content were modified willingly or unwillingly.
Insecure snapshots are all legacy snapshots and snapshots of the newer type, but with an invalid checksum.
You can re-enable the upload of insecure snapshots via the new global setting
Configuration GUI (WATO) -> Allow upload of insecure WATO snapshots
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