I have 2 forms: "EP Configurations" and  " EP Core and Menu Default"

I added lookup filed "EP"  to " EP Core and Menu Default" 

 

from "EP Configurations" - >   field "ID".

Later I decided to get rid of this field. (I deleted it)

 

Now, If I added new record to EP Configuration, and then try to delete it, system hangs forever. The only way I found to delete this record, is to create "EP" lookup field again on the  " EP Core and Menu Default" screen

I shared the application, you can take a look  "EP Tracker" application in "ito_mu" account.

 

please go to "Admin" - >"All EP Configurations" and try to delete record with EP Name "temp1 "