Deployment manager UPDATE error

Hi

I have created a template to create a security policy in Cloud Armor using the deployment manager. But when i tried to update my existing template and run these command getting these error -

gcloud deployment-manager deployments update sre-cloud-armor-deployment --config=cloud_armor_policy.yaml

The fingerprint of the deployment is b'RJFQy4rbDhAbI_hdXS7fig=='
Waiting for update [operation-1695133398408-605b7000f1b5f-79eaa395-587b134f]...failed.
ERROR: (gcloud.deployment-manager.deployments.update) Error in Operation [operation-1695133398408-605b7000f1b5f-79eaa395-587b134f]: errors:
- code: RESOURCE_ERROR
location: /deployments/sre-cloud-armor-deployment/resources/community-dev-cloud-armor-policy
message: "{\"ResourceType\":\"gcp-types/compute-v1:securityPolicies\",\"ResourceErrorCode\"\
:\"400\",\"ResourceErrorMessage\":{\"code\":400,\"errors\":[{\"domain\":\"global\"\
,\"message\":\"Invalid value for field 'resource.priority': '10'. Cannot have\
\ rules with the same priorities.\",\"reason\":\"invalid\"}],\"message\":\"Invalid\
\ value for field 'resource.priority': '10'. Cannot have rules with the same priorities.\"\
,\"statusMessage\":\"Bad Request\",\"requestPath\":\"https://compute.googleapis.com/compute/v1/projects/community-dev-519/global/securityPolicies/lia-alb-waf-p-pod-01/addRule\"\
,\"httpMethod\":\"POST\"}}"


Does the deployment manager not provide a feature to update existing template resources? If not please provide any alternate solution we can automate here