Reported MID Server version 'paris-06-24-2020__patch4b-02-04-2021_02-08-2021_1058' is not compatible with instance version 'newyork-06-26-2019__patch10b-10-23-2020_11-04-2020_1502'. Upgrade is required.
Mid server version is not compatible with the instance version.
The version of the MID Server must be compatible with the version of the instance. Otherwise, the MID Server cannot process commands or communicate with the instance.
The instance determines which version of the MID Server is allowed. The MID Server version must at minimum belong to the same major release, such as Newyork. If the MID Server version belongs to the same major release, it can, but does not have to, belong to the same minor version, such as Newyork Patch 1. In this case, communication with the instance might still be possible, but it is always suggested that you upgrade to the latest version.
If the version is not compatible, the MID Server status is not changed to Down in the MID Server dashboard. So it might still appear to be processing commands when it actually is not doing so. You must check the MID Server Version on the dashboard, which is available starting with the Istanbul release.