Initial Alter Audit - generation alters for all the tables with filed status as change

Hi,

We are in process of app/tools upgrade HRMS 8.9 (PT8.47) to HRMS9.1 FP1 (PT8.51.06).
The Initial Alter Audit process in Change Assistant is generating alters for all the tables on target db which is hrms8.9/tools 8.47. Pls check the following alter script for 1 tables which generated .

It is creating as check(length for each field and altering the tables. Any help is much appriciated.

-- Alters for record PS_JOB_APPROVALS
--              EMPLID - change
--              ACTION - change
--       ACTION_REASON - change
--     JOB_RQST_STATUS - change
--       BUSINESS_UNIT - change
--              DEPTID - change