Delete/Update seeded reason code and termination code

Hi All

There are two parts to this query:

Scenario 1:

User wants only the newly defined reason codes values to be visible while changing contract status.

They do not want the LOV to display seeded reason code values.

However, if we disable the seeded values in 'OKC_STS_CHG_REASON' lookup ,  we are facing the error ''Invalid value for the coloumn REASON_CODE'

Inputs Requested:

1. Is there any way to ensure that the seeded reason codes are not visible to user in the LOV

2. If the above is not possible, can we prefix the seeded reason codes with a value like DO NOT USE.