Reported by andrewDzakpasu at https://mifosforge.jira.com/browse/MIFOSX-1864
create a loan product or go to a loan product to edit.
Go to Advanced Accounting Rule now add Map Penalties to Specific Income Accounts, add two mappings and save.
Now edit the same product and remove the two mappings and save.
Now go back to the product and you will see that the two mappings are still there no changes has happened. This could be due to the empty array of the mappings sent to the api