The value 'pg_availability,pg_cron,pg_stat_statements,pgaudit' for configuration 'shared_preload_libraries' is not valid.

Hello, team!

We have Azure Database for PostgreSQL flexible server
I would like to add over AZURE portal pgaudit extension.
First of all I add here:

Then I try to add here:

Bu t I get deployment error like this : The resource write operation failed to complete successfully, because it reached terminal provisioning state 'Failed'. Click here for details

{"code":"DeploymentFailed","target":"/subscriptions/b4f87ebc-29ee-4ea9-9bde-da59d13b1731/resourceGroups/microservices_group/providers/Microsoft.Resources/deployments/PostgreSQLFlexibleServerParameters_c871b50d51f34bf199630fd76aecf","message":"At least one resource deployment operation failed. Please list deployment operations for details. Please see https://aka.ms/arm-deployment-operations for usage details.","details":[{"code":"ResourceDeploymentFailure","target":"/subscriptions/b4f87ebc-29ee-4ea9-9bde-da59d13b1731/resourceGroups/microservices_group/providers/Microsoft.Resources/deployments/serverParameters-0-c871b50d51f34bf199630fd76aecf3f8","message":"The resource write operation failed to complete successfully, because it reached terminal provisioning state 'Failed'."}]}

The resource write operation failed to complete successfully, because it reached terminal provisioning state 'Failed'. (Code: ResourceDeploymentFailure, Target: /subscriptions/b4f87ebc-29ee-4ea9-9bde-da59d13b1731/resourceGroups/microservices_group/providers/Microsoft.Resources/deployments/serverParameters-0-c871b50d51f34bf199630fd76aecf3f8)

The resource write operation failed to complete successfully, because it reached terminal provisioning state 'Failed'. (Code: ResourceDeploymentFailure)

The value 'pg_availability,pg_cron,pg_stat_statements,pgaudit' for configuration 'shared_preload_libraries' is not valid. The allowed values are 'the ones indicated by PostgreSQL documentation'. (Code: InvalidConfigurationValue)

Error type

The value 'pg_availability,pg_cron,pg_stat_statements,pgaudit' for configuration 'shared_preload_libraries' is not valid. The allowed values are 'the ones indicated by PostgreSQL documentation'. (Code: InvalidConfigurationValue)

{
  "code": "DeploymentFailed",
  "message": "At least one resource deployment operation failed. Please list deployment operations for details. Please see https://aka.ms/arm-deployment-operations for usage details.",
  "details": [
    {
      "code": "Conflict",
      "message": "{\r\n  \"status\": \"Failed\",\r\n  \"error\": {\r\n    \"code\": \"ResourceDeploymentFailure\",\r\n    \"message\": \"The resource write operation failed to complete successfully, because it reached terminal provisioning state 'Failed'.\",\r\n    \"details\": [\r\n      {\r\n        \"code\": \"InvalidConfigurationValue\",\r\n        \"message\": \"The value 'pg_availability,pg_cron,pg_stat_statements,pgaudit' for configuration 'shared_preload_libraries' is not valid. The allowed values are 'the ones indicated by PostgreSQL documentation'.\"\r\n      }\r\n    ]\r\n  }\r\n}"
    }
  ]
}