It would be difficult to distinguish between pk's index and common unique index which the user created himself.
But, we should solve this issue because database performance maybe down because of duplicated indexes in cubrid after migrated.
CREATE TABLE TEST_TBL (
AA NUMBER(10) NOT NULL);
ALTER TABLE TEST_TBL ADD CONSTRAINT SYS_C00169552 PRIMARY KEY (AA);
CREATE UNIQUE INDEX XPK_TEST_TBL ON TEST_TBL (AA ASC);