I am creating a database with several subtables that each have lookup cells in them. The main table has three lookup cells. It has a subtable in it without lookup cells. That subtable has a subtable in it with two lookup cells. I can input data into the main table and the first subtable without any problem. However, it gives the following error when I try and input data into the subtable that's within the subtable. "The changes you requested to the table were not successful because they would create duplicate values in the index, primary key, or relationship. Change the data in the field of fields that contain duplicate data, remove the index, or redefine the index to permit duplicate entries and try again." None of my columns have identical names nor does any row have the exact same thing in it as another row. I cannot find where the duplicate is occuring nor can I figure out a way to organize my tables any better. Are there any suggestions on fixing my problem?