I deleted entire rows from my backend file and now i can't change my any property for any field either in backend or front end.
I am getting error ----- The settings you entered isn't valid for this property.
When i am trying to change anything in entire database
If you are in the backend db, then you should be able to change table properties.
If not, then either someone is in it, or there may be a lock file still open (.ldb)
Exit the backend mdb, delete the .ldb, re-enter mdb and make tbl changes.