This message occurs when duplicate subtypes have been added to the GL Distribution tab. Duplicate subtypes cannot be added directly to the GL distribution tab. This usually results from managing the Gift Subtypes code table in Configuration, especially if the Table Cleanup tool is used.

To resolve the message, check the distribution tab and ensure there are no duplicate subtypes under the same gift type. For example:
 
This is okay, where Bequest, Foundation, and Payroll Deduction are the subtypes:

Cash
Bequest
Foundation
Payroll Deduction

Pledge Pay - Cash
Bequest
Foundation
Payroll Deduction
This is not okay, where Bequest, Foundation, and Payroll Deduction are the subtypes:

Cash
Bequest
Bequest
Payroll Deduction

Pledge Pay - Cash
Bequest
Foundation
Payroll Deduction
For easier review of the GL Distribution tab, right click on the values and select Export grid or Export grid to Excel.