The two benefits are incompatible.
From the entry into force of the Royal Decree-Law establishing the minimum living allowance, no new applications may be submitted for child or dependent minor benefits under the Social Security system, which will be done away with. However, if you were unable to submit your application for a child or dependent minor benefit during the period of the state of alarm, you may submit it within 30 calendar days of the entry into force of the minimum living allowance, provided that you expressly indicate the date on which you intend to submit it.
If you are currently receiving this allowance, the INSS may inform you of the conversion of this benefit to the minimum living allowance during the second half of June. This conversion will be carried out provided that, according to the data that the Management Entity has on its family unit, the amount of the minimum living allowance is equal to or more favourable. However, you may choose to keep the benefit, informing the INSS of your decision, once you receive the communication of conversion between benefits sent to your home.