Peugeot 406 2.0 Timing belt change

Hello everyone Today I started to change the timing belt on my Peugeot 406 2.0HDI bj.2000. The change procedure is well known to me but it is the first time I dare to do this. So I start from the beginning. The first thing I did is that I have made all the plastic parts that are runherunm (air filter housing, computer unit housing etc.) The starter is also off. The timing belt covers are also off. Now the TOT position of the motor follows. The crankshaft After Hayene’s instructions I blocked with an 8mm bolt, but the hole on the flywheel just doesn’t get into the position of the lock on the engine block so that I can insert the second 8mm bolt. Can it be that someone used to put it there (the flywheel is not installed properly) and does it make much difference if I change the timing belt without the flywheel’s Blocade? If you need pictures I can make it tomorrow. Thank you.