I was prompted like this
Hai: You've entered amounts in box B1 of your RL-1 slip for CPP contributions and have also entered amounts in box G for QPP pensionable earnings. Remove the amount from box G and enter your amount in box G2; CPP pensionable earnings.
but CPP pensionable earnings and QPP pensionable earnings are in the same box symboled G only. Where is G2, please?