Steps to regenerate the issue:
1)Navigate to https://demo-trunk.ofbiz.apache.org/scrum/control/main?externalLoginKey=EL0a347422-1144-4dc1-9ab2-a48f17078c13
2)Click on My Profile Tab under Scrum component.
3)Click on Rates Section:
4)Try to delete Existing Rate Amount Record, there is a service invocation error generates while removing the record.
5)If no record exists then create a new Rate Amount record then try to repeat the same process as mentioned in step(4)
Please refer the attached screenshot for the same.