Stuck on Checking Conflicts while adding a new fixture

Ive created a new fixture with 10 channels (par) , my show file currently goes to address 155. I set the new fixture to 324 (all the fixtures were already set to that…why change it). Now the program is stuck at checking conflicts. If i shut the program down and restart it, the show file wont open. However if i press load and select that show file, it WILL open the last “before save”. Thanks for any help!