Which of the following statements is incorrect about G_0 phase?

$G_0$ phase is the stage of inactivation of cell cycle due to non-availability of mitogens and energy rich compounds. The cells in this phase remain metabolically active and usually grow in size assuming particular shape (cell differentiation). Cell enters $G_0$ phase from a cell cycle checkpoint in the $G_1$ phase. $G_1$ phase checkpoint (restriction point) takes the key decision whether the cell should divide, delay division or enter resting stage. Cells then remain in $G_0$ phase until there is a reason for them to divide. Several biocatalysts can help a cell in $\mathrm{G}_0$ phase to proceed through cell division when required.