[Feature Request] Increase the number of custom fields or remove the limit on the number of custom fields

[Feature Request] Increase the number of custom fields or remove the limit on the number of custom fields: Here I would like to make a suggestion: Can we allow users to create a custom number of fields to better meet all the invoice/bill extension needs of users? If this is difficult for the time being, can we at least increase it from 4 to 10?