[CMT2][BUG] After migrated, pk has been changed.

1 Create one table in oracle
CREATE TABLE "TEST"."ATHLETE"
( "CODE1" NUMBER(*,0),
"NAME1" VARCHAR2(40) NOT NULL ENABLE,
"GENDER" CHAR(1),
"NATION_CODE" CHAR(3),
"EVENT" VARCHAR2(30),
CONSTRAINT "PK_ATHLETE_CODE" PRIMARY KEY ("CODE1")
USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
TABLESPACE "USERS" ENABLE
) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
TABLESPACE "USERS" ;

CREATE UNIQUE INDEX "TEST"."PK_ATHLETE_CODE" ON "TEST"."ATHLETE" ("CODE1")
PCTFREE 10 INITRANS 2 MAXTRANS 255
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
TABLESPACE "USERS" ;

ALTER TABLE "TEST"."ATHLETE" ADD CONSTRAINT "PK_ATHLETE_CODE" PRIMARY KEY ("CODE1")
USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
TABLESPACE "USERS" ENABLE

2 Do migration

Actual result:
The pk "PK_ATHLETE_CODE" became to "PK_ATHLETE_CODE1"