Custom component, children create duplicate key

[Jacopops]

Describe the bug
When I drag a new custom component into the module and there is another one already inserted, the keys of the children are not updated but only of the parent causing duplicate keys for each component inserted

Version/Branch
5.3.0

To Reproduce
Steps to reproduce the behavior:

1. Create form
2. Add multiple custom component
3. show the json
4. check the duplicate key

Expected behavior
The same of the parent key, add a number based on how much component there are in a form

Screenshots
First element json:

Second element json:

Additional context
Code of custom component:

H2OIndirizzo: {
                        title: 'Indirizzo',
                        key: 'H2OIndirizzo',
                        icon: 'home',
                        schema: {
                            label: 'Indirizzo',
                            type: 'card',
                            key: 'h2o_indirizzo',
                            components: [{
                                label: 'Regione',
                                type: 'select',
                                key: 'regione',
                                input: true,
                                case: "uppercase",
                                validate: {
                                    required: true
                                }
                            }, {
                                label: 'Provincia',
                                type: 'select',
                                key: 'provincia',
                                input: true,
                                case: "uppercase",
                                validate: {
                                    required: true,
                                    maxLength: 2
                                }
                            }, {
                                label: 'Comune',
                                type: 'select',
                                key: 'comune',
                                input: true,
                                validate: {
                                    required: true
                                }
                            }, {
                                label: 'Indirizzo',
                                type: 'textfield',
                                key: 'indirizzo',
                                input: true,
                                validate: {
                                    required: true
                                }
                            }, {
                                label: 'Numero civico',
                                type: 'textfield',
                                key: 'numerocivico',
                                input: true,
                                validate: {
                                    required: true
                                }
                            }, {
                                label: 'CAP',
                                type: 'number',
                                key: 'cap',
                                input: true,
                                mask: false,
                                tableView: false,
                                delimiter: false,
                                requireDecimal: false,
                                inputFormat: "plain",
                                truncateMultipleSpaces: false,
                                validate: {
                                    max: 99999,
                                    required: true
                                }
                            }]
                        }
                    }

And I discovered that by changing the type of component in a card this problem does not happen

[lane-formio]

Sorry, but I noticed you put the version as 5.3.0. What is version 5.3.0? Because our most edge version of formiojs is 5.0.0-rc.72

[Jacopops]

Sorry is the @formio/react package.