OCI-57303
Cannot create or alter notification directive 'string': 'UPDATE' specified in the ON clause of notification directive on JSON-relational duality view 'string' which is created on a blockchain table 'string'
Cause
Notification directives cannot track UPDATE DMLs on a blockchain table or a on a JSON-relational duality view that contains a blockchain table.
Action
If the notification directive is tracking a blockchain table or a JSON-relational duality view with a blockchain table, specify the ON clause in the directive that does not include UPDATE.