Since Graylog 4.1 was released with a built-in Slack integration with same ID slack-notification-v1 with this plugin. So I have decided to rename this plugin ID to graylog-plugin-slack-notification
The error showing on Graylog 4.1 when you installing the plugin
1) [Guice/DuplicateMapKey]: Duplicate key "slack-notification-v1" found in Map<String, EventNotification$Factory>.
You need to run the following command on Mongodb before installing a new plugin in order to migrate current configuration to a new plugin version
Since Graylog 4.1 was released with a built-in Slack integration with same ID
slack-notification-v1
with this plugin. So I have decided to rename this plugin ID tograylog-plugin-slack-notification
The error showing on Graylog 4.1 when you installing the plugin
You need to run the following command on Mongodb before installing a new plugin in order to migrate current configuration to a new plugin version