Retention Policy is not enabled for Azure Network Watcher Flow Log, this may lead to loss of case sensitive logs.
At this time, the console UI does not have remediation steps available. For possible CLI remediation, see the product documentation (below) or use Terraform.
In Terraform -
References:
https://learn.microsoft.com/en-us/azure/azure-monitor/essentials/activity-log?tabs=powershell
https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/monitor_log_profile