Upgrading Siebel 421 using Upgrade Utility

Hi,

When I try to upgrade Siebel Enterprise 4.2.1 adapter using Upgrade Utility, while upgrading some of configured operations, it changes the output field names to match Siebel BC Field Names, whereas in certain cases, It keeps output field names same as they were in Original CO names. Has anyone faced it? Have you been able to find a solution?