jsonb write fail

[skyien]

class TasksContainer: Codable, PostgreSQLJSONType  {
    var id: String
    var tasks: [String]
    init(id: String, tasks: [String]) {
        self.id = id
        self.tasks = tasks
    }
}
final class User: PostgreSQLStringModel {
...
var tasks: [TasksContainer]
...
}

On save I have this error "{"error":true,"reason":"ERROR: column "tasks" is of type jsonb but expression is of type jsonb[]"}"

json looks like below
"tasks":[{"id":"04242018","tasks":["one","two"]},{"id":"04242018","tasks":["three","four"]}]

If i change type to jsonb[] i have this error {"error":true,"reason":"ERROR: unsupported jsonb version number 123"}