Case insertion

Hi everyone, I have a situation in which I do a case insert where in this situation the case is account child is only can insert once as I do to insert only once this case because when I execute the method it inserts more at once follow the code
@AURAEnabled
public static void openNewCasepoliticament(Account contaPessoal){
try{
Case caso = new Case();
//caso.Description = description;
caso.Origin = 'Plataforma de investimentos';
caso.Reason = 'Problema de Cadastro';
caso.Priority = 'Alta';
caso.Status = 'Novo';
caso.Type = 'Problemas de Cadastro';
caso.SubTipo__c = 'Politicamente Exposto';
caso.AccountId = contaPessoal.Id;
insert caso;



}catch(DMLException dml){
System.debug('Falha ao inserir caso: ' + dml.getMessage());
throw new AuraHandledException('Falha ao inserir caso: ' + dml.getMessage());
}
}