OpenSearch ISM and ElasticSearch Curator Colide

Versions (relevant - OpenSearch/Dashboard/Server OS/Browser):

OpenSearch 2.0.0

Describe the issue:
We are moving from Elasticsearch Curator to OpenSearch ISM .
Due to migration of curator job to ISM policies, we would like to have both curator and ISM at same time in our environment until migration completes.

What is the impact if we run both curator and ISM on same cluster?

If Curator delete action and ISM delete action collides at same time then what will be the impact for cluster? or any one action will fail? if yes then which action will take the priority

Thanks in advance