The author thanks Prof. Maciej Czarnecki for proposing the problem and acknowledges his hospitality at the University of Lodz during the preparation of this paper. This research is partially supported by MINECO/MICINN/FEDER grant no. PID2023-150727NB-I00, and by the “María de Maeztu” Excellence Unit IMAG, reference CEX2020-001105- M, funded by MCINN/AEI/10.13039/501100011033/ CEX2020-001105-M.
Rafael López Camino (Wed,) studied this question.