Data extracted from the Atomic Data and Nuclear Data Tables [S. Raman et al ., At. Data Nucl. Data Tables 78 , 1 (2001)] are used for the calculation of magnetic moments of atomic nuclei. However, in October 2018, the author discovered that when nuclear theorists use Raman’s table, an incorrect math procedure is applied when calculating the magnetic moments for exotic excited even Z = N nuclei. Obviously, it is mandatory for nuclear theorists to ascertain the repercussions of such an error in nuclear physics.