First add it back and make sure it was the reason.
If it has the problem again, I usually make a copy of the original config.pro then delete half of it and retest (you need to restart creo each time you retest with the new config. If the problem disappears, then the setting was is in the deleted half, if it remains, then the problem was in the kept half.
Keeping track of what you have done, continue deleting half of the affected config test file and finding which half has the problem. Depending on how long your config is, it only takes a 3 or 4 or so to reduce it to a list that you can test each individually.
Keeping track of your progress and what you deleted and/or kept is key to this process. I've done it many times and usually only take 10-15 minutes to get thru a long config.
