HOLE IN MY FLOOR!?!?!?!?! Sims 3

I am currently building/editing my sims high rise. NOTE I am using the appropriate cheats. Today, after I placed a ladder then deleted it, a hole in my floor appeared, and I cannot place a floor tile over it. I have tried everthing I can think of: placing a collumn under it, using constrainfloorelevation false to flatten all the floor layers, adding walls under the floor for support, and even trying to use shift when placing floors to cover it. What do I do? I don't want to lose my game file, because I have worked very hard on both the characters, and the highrise as well.

For Stats

My game is fully updated

I have all the expansion packs installed up to and including Generations

Should I install another expansion pack? ( I have more just not installed )

I would prefer not to do this though seeing as I am just testing out each of them to learn all the features.