[CMT2][BUG]Migrate from blob to blob,clob to clob, nclob to nclob the data hasn't been migrated

1 Create one table
CREATE TABLE "TEST"."BLOB_TYPE"
( "ID" NUMBER(*,0),
"BLOB1" BLOB
) 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"
LOB ("BLOB1") STORE AS (
TABLESPACE "USERS" ENABLE STORAGE IN ROW CHUNK 8192 PCTVERSION 10
NOCACHE
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)) ;

CREATE UNIQUE INDEX "TEST"."SYS_IL0000030204C00002$$" ON "TEST"."BLOB_TYPE" (
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"
PARALLEL (DEGREE 0 INSTANCES 0) ;

2 Insert some records.(include picture, text, htm)
3 Do migration to new database

Actual result
The blob field cannot be migrated.