Rollover index lifecycle error

Hi all!

I know there are plenty post about this error but although i read them and all the doc I cant understand what is the error.

I have an index already created which contains many logs--> intextest

I want to apply a rollover and delete with these conditions as it has a large amount of data (dont pay attention to gb and days they are only a test )

rollover --> 10min or 50 gb
delete --> 10min after rollover

the steps are the :

  1. create the lifepolicy
{
  "my-policy" : {
    "version" : 2,
    "modified_date" : "2022-09-07T14:32:44.570Z",
    "policy" : {
      "phases" : {
        "hot" : {
          "min_age" : "0ms",
          "actions" : {
            "rollover" : {
              "max_primary_shard_size" : "50gb",
              "max_age" : "10m"
            },
            "set_priority" : {
              "priority" : 100
            }
          }
        },
        "delete" : {
          "min_age" : "10m",
          "actions" : {
            "delete" : {
              "delete_searchable_snapshot" : true
            }
          }
        }
      }
    },
    "in_use_by" : {
      "indices" : [
        "indextest"
      ],
      "data_streams" : [ ],
      "composable_templates" : [
        "my_template"
      ]
    }
  }
}

  1. create de alias
PUT indextest/_alias/indextestalias

3.create de template

PUT _index_template/my_template
{
  "index_patterns": ["indextest*"],                 
  "template": {
    "settings": {
      "number_of_shards": 1,
      "number_of_replicas": 1,
      "index.lifecycle.name": "my-policy",      
      "index.lifecycle.rollover_alias": "indextestalias"    
    }
  }
}
  1. add the lifepolicy to the index

I dont understand why this error remains
Thanks in advance

Ok, just a bit error, the alias is not working ok

but this error give me headache too what is wrong with the alias'name?