How to delete historic process instances in Camunda with Robot Framework

delete_process_instance_history.robot

*** Settings ***
Library    RequestsLibrary
Library    json

*** Variables ***
${START_BEFORE}    2021-08-01T00:00:00.000+0200
${CAMUNDA_URL}    http://localhost:8080

*** Tasks ***
Get history
    ${params}    Create Dictionary    startedBefore=${START_BEFORE}
    ${response}     GET    url=${CAMUNDA_URL}/engine-rest/history/process-instance    params=${params}
    ${historic_process_instances}    json.loads    ${response.text}

    FOR    ${process_instance}    IN    @{historic_process_instances}
        ${result}     DELETE    url=${CAMUNDA_URL}/engine-rest/history/process-instance/${process_instance}[id]
    END