Ontology forces urgent node upgrade after restarting chain hit by malicious activity

Ontology said its mainnet resumed normal operation on Sept. 2 after an emergency security pause and told every sync-node operator to upgrade to version 3.1.5. Sync nodes are infrastructure that keep their copy of the blockchain synchronized with the network.The restoration notice says the new software is required to maintain compatibility with the restored chain and ensure stable synchronization. Ontology told operators to upgrade as soon as possible, confirm that their nodes are fully synchronized, and verify normal operation afterward.Older software therefore carries a compatibility and synchronization risk, although the notice does not say that every unupgraded node has already failed.Ontology resumed mainnet operations after malicious activity, while requiring all sync nodes to upgrade to v3.1.5 as remediation continues.The restoration followed a pause that began Aug. 31. Ontology initially described the trigger as a potential security concern found during a daily security check and suspended block production, leaving on-chain transactions unprocessed.A Sept. 1 update escalated that description, saying the team had identified malicious attack activity targeting the network whil...