Is there any tutorial that says how to down clock the clock for my project? Is it only changing the CLOCK_PERIOD in the config.ctl file?

What does down clock mean?

I want a slower clock for my project as I think that the default one is giving me problems with the slacks at 8-replace.log. Then, openlane says error at 11-opendp.log with too many warning of detailed placement failed and overlaps messages. I'm thinking that the root of the problem is that the default clock is too fast for my project. In quartus I know that I can put a PLL and decrease it, but here I don't know how to it, if just changing the period at config.ctl is enough or If I need to do more things. Thanks

Yes just set it slower in the config

ok thank you