Before any court enters any decree in a matter pending before it involving the custody of a minor child or children, an affidavit shall be filed with said court averring that there is no proceeding pending in any other court affecting the custody of such children or any of them or, if there is such a proceeding, a statement in detail of the nature of the proceeding and averring that the decree of the court would not conflict with or interfere with such other proceeding. For the purposes of this affidavit, visitation rights granted by the Superior Court shall not be considered as affecting the custody of such child or children.