1. Take a good back-up of the stat schema
2. Run the following statements against the stat db:
DROP INDEX ST_PSDBFIELD_8F_IDX1 on STAT.ST_PSDBFIELD_8F
DROP INDEX ST_PSDBFIELD_8F_IDX2 on STAT.ST_PSDBFIELD_8F
ALTER TABLE STAT.ST_PSDBFIELD_8F ALTER COLUMN FIELDNAME nvarchar(18) not null
CREATE UNIQUE CLUSTERED INDEX ST_PSDBFIELD_8F_IDX1 ON STAT.ST_PSDBFIELD_8F (
SD_CD, CSR_ID, SWAT_ID, PS_DATABASE,FIELDNAME)
CREATE INDEX ST_PSDBFIELD_8F_IDX2 ON STAT.ST_PSDBFIELD_8F (FIELDNAME)
UPDATE STAT.ST_PSDBFIELD_8F SET FIELDNAME=RTRIM(FIELDNAME)
UPDATE STAT.CSR_PS_SWAT_SUBOBJ SET SUBOBJ_NAME=RTRIM(SUBOBJ_NAME)
3. Try the migration again