Ansible incorrect behaviour with when - automation

Question

I have task which checks all kibana spaces, and if some kibana spaces doesn't exist it creates it
Here is my ansible code
- name: get all kibana spaces
uri:
url: '{{ kibana_url }}/api/spaces/space'
method: GET
force_basic_auth: yes
url_username: elastic
url_password: "{{elastic_ca_pass }}"
register: spaces_result
and here is a output of spaces.result variable ( all kibana spaces that exist )
"color": "#aabbcc",
"description": "tajikistan kibana space",
"disabledFeatures": [
"timelion",
"canvas",
"maps",
"Metrics",
"logs",
"apm",
"Security",
"uptime",
"advancedSettings",
"machineLearning",
"ingestManager"
],
"id": "tajikistan",
"initials": "MK",
"name": "tajikistan"
},
{
"color": "#aabbcc",
"description": "uzbekistan kibana space",
"disabledFeatures": [
"timelion",
"canvas",
"maps",
"Metrics",
"logs",
"apm",
"Security",
"uptime",
"advancedSettings",
"machineLearning",
"ingestManager"
],
"id": "uzbekistan",
"initials": "MK",
"name": "uzbekistan"
}
],
so we have a 2 Kibana spaces ( tajikistan and uzbekistan )
then the next task about to create uzbekistan space
- name: create uzbekistan kibana space
uri:
url: '{{ kibana_url }}/api/spaces/space'
method: POST
body:
{"id":"uzbekistan","name":"uzbekistan","description":"uzbekistan kibana space","color":"#aabbcc","initials":"MK","disabledFeatures":["timelion","canvas","maps","Metrics","logs","apm", "Security","uptime","advancedSettings", "machineLearning", "ingestManager"]}
body_format: json
force_basic_auth: yes
headers:
kbn-xsrf: 'true'
Content-Type: 'application/json'
url_username: elastic
url_password: " {{ elastic_ca_pass }}"
when:
- '"uzbekistan" not in spaces_result.json'
so this task will execute only if uzbekistan not in spaces_result variable but it execute why?
ASK [../roles/elasticsearch_nopci_efk_users : create uzbekistan kibana space] ***********************************************************
fatal: [loges-prod-01-uv01]: FAILED! => {"cache_control": "private, no-cache, no-store, must-revalidate", "changed": false, "connection": "close", "content": "{\"statusCode\":409,\"error\":\"Conflict\",\"message\":\"A space with the identifier uzbekistan already exists.\"}", "content_length": "99", "content_type": "application/json; charset=utf-8", "date": "Thu, 08 Apr 2021 09:13:51 GMT", "elapsed": 0, "json": {"error": "Conflict", "message": "A space with the identifier ibank already exists.", "statusCode": 409},
so why is it exeucte?