There is a difference between 100% bonus depreciation and Section 179 depreciation.
Estates and trusts cannot claim the 179 deduction.
Ergo, I believe you are getting bonus depreciation and want to elect out.
Where are you see the 179 deduction? On the depreciation Schedule? i.e. 179/SDA? or are you seeing in on the Form 4562, line 6 or are you maybe seeing it on line 14?
You really need to make a concerted effort to get 179. You must make an entry to get that.
You really need to make a concerted effort NOT to get SDA. You must make an entry to make it go away.